Malicious PDF — malware analysis report

Static analysis result for SHA-256 c847f09186b49c46…

MALICIOUS

PDF

94.6 KB Created: 2021-04-02 02:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 040b9a3d3d64729fc5ebba07317b0ccd SHA-1: 1b98727208c42e4b97e84b95849ef373be2cd71c SHA-256: c847f09186b49c461b2742728c42fbf885ab8f511e772957c1b785398818a3d5
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing a large number of external links to other PDF documents hosted on various disposable domains. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious content or to manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/123?utm_term=braveheart+theme+flute+sheet+music PDF link annotation
    • https://rebadezoj.weebly.com/uploads/1/3/6/0/136027304/8307471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393625/normal_6063b240345ab.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/6019481.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/chjhgjh/best_ringtones_2020_punjabi_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/vopuvafamiw/fjbKhiQ/wumenerixonolesirewagim.pdfIn PDF document text
    • https://kasasifu.weebly.com/uploads/1/3/4/6/134697732/9316628.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427501/normal_6037c03d9078a.pdfIn PDF document text
    • https://puduwuxibipufu.weebly.com/uploads/1/3/5/9/135966859/709f2a8134.pdfIn PDF document text
    • https://rokumetusemep.weebly.com/uploads/1/3/4/3/134382705/7431143.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408582/normal_5fe23aeb96179.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/igsig9y/tuning_club_online_mod_apk_rexdl.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/d5da409d-d32f-4f85-8541-771ef185717b/amazon_prime_junie_b_jones_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/700b4832-db96-4640-99e0-e5698b1247df/xem_phim_trung_quc_s_kiu_truyn_phn_2.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/tutumusiledinufanukanidax.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/icarus_rpg_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/zajojelurivatu.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/cb_editing_photo_background_full_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28d8c3ac-68d5-471d-9919-16eefc28e887/what_is_555_in_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1c0aed-3dc6-4097-8894-f3738f295cfe/wopuxiluvoxurimujufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1bb275-ef37-4691-bfa8-299175dfb375/tecumseh_carburetor_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/twilight_breaking_dawn_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abeb544e-4617-4700-9231-9a9f2f886836/is_fl_studio_a_monthly_payment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cef6018-c301-4d48-94fe-a534f6c3853c/the_disappearance_of_childhood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e982329e-4395-4da5-b7e0-3383f3fbadc0/xobafixomixe.pdfIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE543 20468 bytes
SHA-256: c80af10bff0d30046ff8abcc646c4b7777a3b882216fd62faa86c98cbb7ecb8c
font_01_sfnt_off000124a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A7 4896 bytes
SHA-256: 6c821f377ffa873d34bd330c72d783e136198f3d61dfc2da7eb2e3747a9aeeba
font_02_sfnt_off00013552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13552 12376 bytes
SHA-256: 64fe288373ab5463dff6e9d69710d9ca39588659d4c10cded80a5f392272a2b7
font_03_sfnt_off00015de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DE0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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