Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96ae69ba5aa6374…

MALICIOUS

PDF

88.2 KB Created: 2021-04-07 04:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b1bd145758594cd9a10ebcb092df1f9c SHA-1: 729d60fc64f615f69dc64d2d42a7972ecca62cac SHA-256: e96ae69ba5aa63740ef03bedf31392c22ae502153a4eace7ab9912303336f499
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=how+to+get+wind+materia+ff7+remake PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409997/normal_6000060ca9089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414488/normal_60205ea800c6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422161/normal_600cb6a7b5960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_604eb9fc271b6.pdfIn PDF document text
    • http://kugugulobirujut.22web.org/tefobudogegidiwuma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_6027f374deaa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412154/normal_5fd32aa893a91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zugujegezamuto.epizy.com/vodafone_mobile_wifi_r216_driver.pdfIn PDF document text
    • https://0b902d11-d057-4dfc-bffd-bcb57e9ba729.filesusr.com/ugd/696b8a_845a1316c6f74ba7af622a2b3660d83c.pdf?index=trueIn PDF document text
    • http://wiregenuris.rf.gd/jilupekisu.pdfIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_ced944d75f8b4071807fbf392e07c115.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db291330-d60a-41a6-a834-a08bdafbe686/schwinn_airdyne_ad7_best_price.pdfIn PDF document text
    • http://zapizuw.rf.gd/weworiwuxalom.pdfIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_a5c061ad2be742ad8388f08b74a99961.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/096a29f3-329c-46cf-8f5d-9803d8deba03/a_link_to_the_past_3ds_walkthrough.pdfIn PDF document text
    • https://7e62deb9-9b1a-4e2d-8b60-9a8f762ee201.filesusr.com/ugd/1f553f_3b4af0cc094e48789529ca809cc1edf4.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001070e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070E 4332 bytes
SHA-256: 1469d92f2ac461528d05c696b3c386077e31f9ce2f8c21f878240841aa648d9b
font_01_sfnt_off00011644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11644 5212 bytes
SHA-256: 87a3b34462e56564649eaae8b62236f17bfb7b59f3bbf55259ee1abec740e557
font_02_sfnt_off0001280a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280A 13020 bytes
SHA-256: b9327421e8d79e69c0aca55c70e156c35b9f024cb44a62e94bcec353f7993512

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