Malicious PDF — malware analysis report

Static analysis result for SHA-256 93717484e676bb03…

MALICIOUS

PDF

71.7 KB Created: 2021-04-03 20:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ffe2589b6f6a1565112dbb6ae4e26abe SHA-1: 7b1eb06a0f237ce1edab500fa9a581db111f4977 SHA-256: 93717484e676bb0304cac015930d5e84943a9a08b182255e18fd6b573f216eba
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. ClamAV and ML classifiers strongly indicate maliciousness. The presence of external URIs and the nature of the heuristics suggest the PDF is intended to redirect users to malicious sites, likely as part of a phishing campaign or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/award?keyword=telemecanique+altistart+01+pdf PDF link annotation
    • http://shortsomfj.space/slingbox_500_supported_devices74oc1.pdfIn PDF document text
    • http://digitalmedialit.com/the_motley_fool_investment_guide_reviewux32x.pdfIn PDF document text
    • http://uablog.website/74263993924k6vt2.pdfIn PDF document text
    • http://natlegend.space/freckle_juice_storyy72k3.pdfIn PDF document text
    • http://bupetud.xyz/raymond_electric_pallet_jack_wheel_replacementc35j2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466996/normal_6026cb4629cd3.pdfIn PDF document text
    • http://maddot.space/will_there_be_a_5th_wave_27sd1h.pdfIn PDF document text
    • http://chtotakoevuxom.biz/wosegetiwabajubiditatoisc1x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480758/normal_5fdf3e675264f.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/94b83ae6-8c13-4b33-a589-e9f9714cee6e/les_trois_mousquetaires_film_1961_acteurs.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/36925706616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3594459-91aa-41b6-9752-f733562f68a7/10271158328.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/fixufosezikujeru.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/jodujolixoduwuzimasidi.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/how_to_manage_your_time_in_grad_school.pdfIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_a84eddb1283445da8f4daf7f39a5418a.pdf?index=trueIn PDF document text
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_24addf4c79b24128b36ad34d1d3bf580.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f721598-e5c0-4bc7-b8fb-53b9f3ca10f6/christmas_family_feud_game_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b1b0af5-737a-497a-a36e-70f5a6d87e5a/blender_2.82_tutorial_in_hindi.pdfIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_a58b7470a2eb4c0e9974619a413890b2.pdf?index=trueIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_ebee8c86aa3c4946a72f5fea5942ab1f.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_9593f1cbfd874dcb867e49c1a4649782.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FD 5572 bytes
SHA-256: 1963d18e2881e36112a2b2db806d332f3bb18990700b8a8f67566b8c348f77c5
font_01_sfnt_off0000ead1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD1 11364 bytes
SHA-256: ae3b6a349fc81256e3cf7bda155a5f889d7a1eb4c0ebedf2d52fbca3120697e6

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