Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9e2f414bfcf367…

MALICIOUS

PDF

89.1 KB Created: 2021-03-25 03:04:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: b682d2801d454c09465398d6c285575e SHA-1: 52e111be26ac7377df3cb49e458ab72913f20ae3 SHA-256: 5e9e2f414bfcf367d71ae459a3b8e50ddbdac565158e0a326dedbaa0b8c7ca7e
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, with many hosted on disposable domains, indicative of a link farm or phishing lure. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://kuzutuzo.ru/strik?utm_term=gram+parsons+a+song+for+you+lyrics+meaning PDF link annotation
    • http://mebezikad.22web.org/deruribawido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_603404543d2d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451754/normal_6056763a34ade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371023/normal_5fe805e824f48.pdfIn PDF document text
    • http://xufisuraber.22web.org/pan_africanism_ideology.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389805/normal_5ff0cf05a13ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_60342849c7174.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xizanisud.epizy.com/vewozu.pdfIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_98dc1ab2be844d049ebc50ab98dcaaf6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f956d2-53b1-40fb-aa5c-b0a17b2da2f6/how_to_pair_bluetooth_jvc_headphones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f00e37-cad3-4e3f-b61c-90ebf45f0df9/94955614087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcdd77d9-6b8d-4074-ba1e-503461177a00/59679959546.pdfIn PDF document text
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_c47bab840bd34d84b2e3ee1c90c3850a.pdf?index=trueIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_eb3a29152837458bb94689d70fae4dee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba30c45e-530e-4a46-ad0a-a32c1b41fa95/jumping_jacks_benefits_abs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4584be-9935-41a7-b609-10ec9a576b7a/wupema.pdfIn PDF document text
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_44dcc1f0be5b4fcdb988ff97f06c4e76.pdf?index=trueIn PDF document text
    • http://mejufupivu.epizy.com/letter_to_hogwarts_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/277d991b-bdba-4933-bbb8-7c6a4e8a296c/49635639728.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_901b8562a89b4f6d9ee1f0d2b240f4a4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/867dcf1d-7eff-42db-84d7-c6737f043ae8/how_to_check_transmission_fluid_in_2005_chevy_classic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a01d67-2718-46f4-87ce-3c1efc39f380/fijope.pdfIn PDF document text
    • http://witosef.rf.gd/abp_news_full_form_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f82cb9d-186c-42f6-9869-5de5ff88a129/how_to_connect_my_vizio_sound_bar_to_my_tv.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF749 5468 bytes
SHA-256: 7ee3ec41915d83af780a23f4530973e1b2ecfa5a38b2f4a305cd8bdff619b048
font_01_sfnt_off000109d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D6 4564 bytes
SHA-256: 6c0b80b71b662b8f41c35e8b850d2baa37462ab394e73fa65e2c8a99d7f98587
font_02_sfnt_off00011b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B14 11124 bytes
SHA-256: 6e3529e28154c6534306c32bba58162654ae127f774bb3ae5b96c7e31121d497
font_03_sfnt_off00014158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14158 16036 bytes
SHA-256: bc1c1644e30597ae0beaac312b9749a82b64e26c109397326cdc67fdbaf2fe17

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