Malicious PDF — malware analysis report

Static analysis result for SHA-256 2116e607dedbfb06…

MALICIOUS

PDF

82.1 KB Created: 2021-06-04 01:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d4f59ee25ce3c511b2eeb845c07b892 SHA-1: 742a267a222f33bd1f6b642799520d08f2f391fb SHA-256: 2116e607dedbfb069107bad82ee8d7fdaecbf15011b6fbc40a6762fa5514fa66
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It functions as a link farm, embedding numerous URLs that redirect to various domains, likely for phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://philabc.ru/pbw?utm_term=pokemon+gba+rom+hacks+fire+red
    • https://bipixexomalexu.weebly.com/uploads/1/3/4/3/134349320/zazoxoruzi.pdf
    • https://static.s123-cdn-static.com/uploads/4422906/normal_60016a55e9993.pdf
    • https://cdn-cms.f-static.net/uploads/4499334/normal_60580af57afab.pdf
    • https://cdn-cms.f-static.net/uploads/4475989/normal_5fdc1ada3b09a.pdf
    • https://static.s123-cdn-static-d.com/uploads/4404745/normal_60b3074aafd07.pdf
    • https://cdn-cms.f-static.net/uploads/4402488/normal_5fda813047e8a.pdf
    • https://rogapasutidubu.weebly.com/uploads/1/3/1/4/131438129/8867236.pdf
    • https://static.s123-cdn-static.com/uploads/4369499/normal_5ff7730f1ae04.pdf
    • https://renepavavoz.weebly.com/uploads/1/3/4/0/134012855/7ba0e2.pdf
    • https://cdn-cms.f-static.net/uploads/4484375/normal_601abbad58f5c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bezawagiga.pbworks.com/w/file/fetch/144559932/bathstore_shower_screen_installation_instructions.pdf
    • http://zizovitunex.pbworks.com/w/file/fetch/144483750/tatezedubefe.pdf
    • http://garewewaziwu.pbworks.com/w/file/fetch/144541749/lesapijasupa.pdf
    • http://wenuveraroto.pbworks.com/f/brush_your_teeth_lyrics_little_baby_bum.pdf
    • http://tarogifere.pbworks.com/f/ejercicios_de_parabola_horizontal_con_vertice_fuera_del_origen.pdf
    • https://uploads.strikinglycdn.com/files/b9a63068-1080-4ed1-aa60-b14eb6a65393/goxowidikatapagulareguk.pdf
    • http://wekibivu.pbworks.com/f/77081539006.pdf
    • https://uploads.strikinglycdn.com/files/01007ae8-8ea8-42e3-b22d-14314cc942e8/sipobopiru.pdf
    • http://gabekujijud.pbworks.com/f/jacquie_lawson_cards_are_they_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001006a.bin
600097ab9e19351088cd897ed4bc19f8454b636083b39631c71f12d47a3d1049		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1006A 5608 bytes
font_01_sfnt_off0001135b.bin
02e7cd7cd006b8e4b7e724e3134767092938f5e499ca759cc4b2e204088d5ee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1135B 12016 bytes

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