Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5fb132ba0a8863b…

MALICIOUS

PDF

91.0 KB Created: 2021-03-16 22:56:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 609f8dee1b29952ebd9591d443606a5b SHA-1: 99dd6df8538fd0cb74ae95fbd0cf935c7743a913 SHA-256: f5fb132ba0a8863bcccfb5cc83e532fba7b9e5935de48885bb5e8ea94ea6a7f0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • 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 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://vilenefex.ru/wix?keyword=y8+blocked+out PDF link annotation
    • http://kinemulawaw.sportsontheweb.net/kakixukowoje.pdfIn PDF document text
    • https://cdn.sqhk.co/nufuwijili/6Rie2ia/microsoft_planner_tutorial_deutsch.pdfIn PDF document text
    • https://cdn.sqhk.co/zetikitor/jcgjrGm/mit_sloan_management_review_vs_harvard_business_review.pdfIn PDF document text
    • https://cdn.sqhk.co/kibedutej/dejjl6E/idle_heroes_star_system.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/W7aTLJ0/best_80s_music_playlist_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/lojewewure/Rjiz9hc/bitcoin_testnet_address_format.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/exThdic/olympic_archery_equipment_price.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/medios_de_comunicacion_salvadoreos.pdfIn PDF document text
    • http://milesatel.mygamesonline.org/handwriting_analysis_online_activity.pdfIn PDF document text
    • https://cdn.sqhk.co/zegegajugot/c9gcgdW/87465043815.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/56283e75-45f1-41d4-966e-50dd962506ce/the_lying_game_tv_show_dvd.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/rojonokedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c002f754-dec4-43d8-9542-b9989244fbe6/daxalejigodanafekawifa.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/59128856007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9444a7d-4b8f-45e0-9722-82c1e9c0cb64/46156768598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06d8956-1a42-456e-821d-dfdd09bcc33b/lukawarobetejitag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/398f7a8f-edb5-4609-a571-713328ff8d9c/echo_cs_590_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3edf6383-87b5-4c77-922d-1375a696ab7e/28879068261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ee0889-bdb6-4d91-89f1-514792ee5e33/stephen_king_rage_film.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f91a119e-6c3b-418b-b552-9f6e204d89a4/vizio_tv_e371vl_manual.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/1969_ford_mustang_mach_1_price_in_india.pdfIn PDF document text
    • http://luvepel.myartsonline.com/disadvantages_of_free_education_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/763a0824-3286-4410-817b-372d2b5de180/separation_of_powers_means_in_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd9b483d-1252-4601-93e2-d11ce5be0abe/66255234068.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/waditawibegejukix.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD6 13200 bytes
SHA-256: 1e52bf4d022a9a8989d6168d40759e01dee964f5a4ea3564ecfafcf875dde228
font_01_sfnt_off00010aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABA 4808 bytes
SHA-256: b1cb940d1a23f36ef47e1d2120b4a6bbd86f47dcad011bbe4919d59356a9aa68
font_02_sfnt_off00011b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B27 10164 bytes
SHA-256: cba20e29045081ea64b327cfddadfceac15cfa353737588eb970e41ba406e922
font_03_sfnt_off000137cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CB 10856 bytes
SHA-256: 3ba22695d6882f56dd89af411ff172162d8db12fb60d87828ff7fd34051f0f9f

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