Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4c8b5e5fa68f1d…

MALICIOUS

PDF

97.4 KB Created: 2021-05-08 16:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b4ca26338e9e004d89443b409f842d32 SHA-1: 1092e9ce81b15cfa0cdd396fba3070b12f6bcdb1 SHA-256: ac4c8b5e5fa68f1d412451c1dd00aaa0aac1b0a901e17cb214c3f30c4232a894
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/strik?utm_term=surah+mulk+full+youtube PDF link annotation
    • http://yblda.fun/a_discovery_of_witches_season_1_episode_2_full_episode_dailymotion7nvrj.pdfIn PDF document text
    • http://koluxime.iblogger.org/matonekexogaxanaroxulepo.pdfIn PDF document text
    • http://checkmycredit.info/netgear_gs108pe_user_manualdapjk.pdfIn PDF document text
    • https://cdn.sqhk.co/fipakebeb/vjiHfdE/evette_rose_metaphysical_anatomy.pdfIn PDF document text
    • http://graatorama.space/how_to_calculate_the_magnitude_of_the_repulsive_force5v05i.pdfIn PDF document text
    • http://zalewef.iblogger.org/how_to_replace_wall_outlet_with_usb_ports.pdfIn PDF document text
    • http://keepqifi.site/eduardo_galeano_el_libro_de_los_abrazos_fragmentosjuhk6.pdfIn PDF document text
    • http://gidujepeparu.22web.org/rezunejif.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/fkEShjV/amazon_music_hd_price_uk.pdfIn PDF document text
    • http://paypallsecurity.com/troy_bilt_generator_3550_fuel_tankz2xn1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4de95ac0-54a1-4d92-aa29-bb8844e8122f/3129704511.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_2f6369c88785429e843fef2bbbd75eea.pdf?index=trueIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_83825cc9913541b7888c505ada9b1b6f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc644c4f-7888-45d3-b86c-95ee0643bd36/formato_de_carta_responsiva_de_auto.pdfIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_d2d00cd534fa4f1488fea61e2ec91fea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dbc23a7-ccaf-4093-8087-63f84c125fe5/starcraft_aluminum_boat_for_sale_ontario.pdfIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_066d77419b7147309e7231d949b278fb.pdf?index=trueIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_eb989c80304f43a2b2be985f71725a3e.pdf?index=trueIn PDF document text
    • http://ruxemad.epizy.com/89086666775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4c6074-0f7e-49bd-bc0d-3cd11218ca75/amc_8_2020_problems.pdfIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_d06e8b49e5764f03b261396334c31a3e.pdf?index=trueIn PDF document text
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_6404db2e32864beeb80720b165d725aa.pdf?index=trueIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_2076661b19684bf28523a0a3f60b4e73.pdf?index=trueIn PDF document text
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_ec866b0793d74648b338b9e8cf6b2588.pdf?index=trueIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_04f0288494ec429d93dd58e5f1cfabfc.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001447d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1447D 20940 bytes
SHA-256: 653dcf111450fdf2e30ac53c2debc3f20371eae5689ae9754d5377ef21eec413
font_00_sfnt_off0000efc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC9 4968 bytes
SHA-256: 68df19bcc5a1681a8ef5068f3b47a24266aa60fa6d6c1bd29fe01c75726dcab4
font_01_sfnt_off000100bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BB 5240 bytes
SHA-256: a65d2e035f20d763159db21a34c06f4fa8f0220236abe30ff17c426e6e8eb317
font_02_sfnt_off000111a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A6 2856 bytes
SHA-256: bb5782df2f98ad5a1c35553f0119fbe59af9cfbeb13f30bc6af69d33c112935e
font_03_sfnt_off00011e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E00 11232 bytes
SHA-256: 80d6ce67f38ab75e1346282cf943483f037a0eba456d0264615e79d58517b8c5
font_05_sfnt_off000168c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168C4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.