Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d66ddba11b9dd2…

MALICIOUS

PDF

79.2 KB Created: 2021-03-23 04:20:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 92e1810405f063a9d0d4223e0788f0e9 SHA-1: b7f2c75cdb6cf4a1a953642ee2f5d098810876f4 SHA-256: 06d66ddba11b9dd25d96147aca2bd30dedcbd55e21eb7de9601c954f63429d0a
194 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains a title related to 'how to write quotes in ap style', which serves as a lure to mask the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gimoguvi.ru/strik?utm_term=how+to+write+quotes+in+ap+style PDF link annotation
    • https://cdn.sqhk.co/noxivudeva/tJgfhak/baseball_trading_cards.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5fe8dd422d642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403948/normal_604634e078c21.pdfIn PDF document text
    • https://jidedenevunuva.weebly.com/uploads/1/3/4/4/134498736/tubewow.pdfIn PDF document text
    • https://fizabogozof.weebly.com/uploads/1/3/2/8/132815807/a98dc96f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378623/normal_5fe5d0b4b0f09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425913/normal_60261a9531b3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_60403633d18d9.pdfIn PDF document text
    • https://cdn.sqhk.co/juzosugun/XdVhb0D/fun_race_3d_game_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471467/normal_60377591a663f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492588/normal_6026132ac1295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475375/normal_600fde0102989.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/IuNifif/wigoxazewomavogopipamo.pdfIn PDF document text
    • https://lupawepenotude.weebly.com/uploads/1/3/1/6/131606523/eba75fd1f8e663f.pdfIn PDF document text
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/zopukipadopatukewati.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/lNHChj7/37364782737.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/rasusurepor-nanigiko-fowudobopalod.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/hct7Pgj/survivors_rope_ladder.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ada5ad24-0b72-4fe3-bca8-c714d004461d/8603594806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2046f3-c863-43dc-b2d1-1182c7aab256/how_to_turn_off_the_hourly_chime_on_an_armitron_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff6dd6dd-282f-4d4e-82dc-308c6a164332/minn_kota_ultrex_for_sale_craigslist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6181ba-e47c-47d7-ba6c-e5e7fbe89380/interpretation_of_robert_frost_the_road_not_taken.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75C 5096 bytes
SHA-256: 803c5a5e55992684704026b7a067f474f409839d6a68ced421d23f07dfeb73cf
font_01_sfnt_off000108d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D7 10860 bytes
SHA-256: c17edd9f7f30a1ec25ba680c202152e89ae7e05f52deb611d7e934e5bdb0bd1d