Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d526f32a0a057e…

MALICIOUS

PDF

92.7 KB Created: 2021-03-22 09:03:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b9bb25100d1fa15fb58dd2b7eb0c1718 SHA-1: 6ee746a27fb1071935494157625721f91b767044 SHA-256: e9d526f32a0a057e4ae246f974fde3643efeeabeca22d646852a504f14825e9d
186 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary malicious URL identified is https://jumiwimov.ru/award?keyword=epidural+anesthesia+in+dogs+pdf, which is likely used to trick users into downloading further malware or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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/award?keyword=epidural+anesthesia+in+dogs+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456984/normal_5fff240a3f341.pdfIn PDF document text
    • https://loniforuwo.weebly.com/uploads/1/3/4/9/134904684/4003639.pdfIn PDF document text
    • https://suwudaxodorepe.weebly.com/uploads/1/3/4/8/134885248/xorififazimoni-lamox-mobiduzarekolo-zamegadu.pdfIn PDF document text
    • https://zogopovedizojux.weebly.com/uploads/1/3/1/4/131408172/dilagofawofopobeweka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414860/normal_60581baf3b9ec.pdfIn PDF document text
    • https://mopotiwifatuge.weebly.com/uploads/1/3/0/8/130813373/4192284.pdfIn PDF document text
    • https://wonakusoxenim.weebly.com/uploads/1/3/5/3/135340368/9312804.pdfIn PDF document text
    • https://vakexojukesazi.weebly.com/uploads/1/3/0/9/130969985/2710959.pdfIn PDF document text
    • https://minufagotokuwak.weebly.com/uploads/1/3/4/4/134489045/valizugulikuw_dowexaruv_gogiloju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426257/normal_5feafc8c6c0ec.pdfIn PDF document text
    • https://notususapi.weebly.com/uploads/1/3/4/0/134012365/5a5ee7.pdfIn PDF document text
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/guluw_nosix.pdfIn PDF document text
    • https://mefarixikokupa.weebly.com/uploads/1/3/4/7/134759110/1402351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501356/normal_60317a9e369db.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://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_3f850db2faa042d7b41036159d3ad23f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/012441c6-1f38-4e44-b318-3d6be8273699/41083676461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad68a50b-0aa8-4969-94bf-d39f01d13d11/ryobi_ry08420a_backpack_blower_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7cf3f7c-641b-4978-83b8-225bfff50569/how_many_calories_in_a_4_piece_mozzarella_sticks_from_sonic.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_a954ac084f9f41bca38f69dcca614d9a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb52d2c-45a0-49af-ab75-e9c97752db99/mitsubishi_electric_mini_split_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c3e9b2b-605e-49c6-b266-330d799c8605/pharmacotherapy_casebook_answers.pdfIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_e53c3c5b21ab40e499a035b9a727727c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/73baf2a9-7ad9-45c3-935d-2a9fdb808e0d/what_is_cronbach_alpha.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c59b6d-0708-46ea-a9f6-d1e7365890f7/36310135322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e8fe95e-0240-48f1-acb7-feaa5cad624c/stanley_300_amp_jump_start_system_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1B 5144 bytes
SHA-256: 4a78916635855fc78c7437fff019817f7de5f0ef544793bacc5b117a947cffce
font_01_sfnt_off00013094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13094 11788 bytes
SHA-256: 6a12c2df449fab7c00f2655575ba3914333fbc1c724e965718ef2db0a99e498b
font_02_sfnt_off000156ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156EE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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