Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c997592f23c6ed…

MALICIOUS

PDF

73.9 KB Created: 2021-03-30 07:38:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 03e3ebe4bda00eba02494119d1b00642 SHA-1: 0468ee7e5b16062e8cf9b52dd96f9f77b8d3b2cc SHA-256: a1c997592f23c6edb50cbe23950637bd324511883b8ec81ba72f1b2e76e83ca9
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the document's structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/wix?keyword=dofu+sports+live+stream+apk PDF link annotation
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/doxodulefajusemimowu.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/20453304837.pdfIn PDF document text
    • http://limons.space/dragoon_guide_ffxiv_4._5whce6.pdfIn PDF document text
    • https://vaxudiku.weebly.com/uploads/1/3/4/7/134709892/6761778.pdfIn PDF document text
    • http://birapemotafew.mygamesonline.org/aromaterapia_definicion.pdfIn PDF document text
    • http://zilitimo.getenjoyment.net/wenarawokano.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378620/normal_5fcc1fc0990e8.pdfIn PDF document text
    • https://fusodozot.weebly.com/uploads/1/3/4/0/134096428/9b014fc60cf.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/vakaloluzozedijizilevove.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/13087265733.pdfIn PDF document text
    • https://tobisimotar.weebly.com/uploads/1/3/5/3/135330661/pisosakakum.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/operations_research_and_financial_engineering_salary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416495/normal_601dc0340ae10.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/can_i_buy_tracfone_at_walmart.pdfIn PDF document text
    • https://nakaporona.weebly.com/uploads/1/3/1/4/131438848/nevin.pdfIn PDF document text
    • http://bewilotaweje.mywebcommunity.org/organic_chemistry_reaction_mechanisms_flashcards.pdfIn PDF document text
    • http://robertferrell.net/deguponijepiwel7xdtc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480745/normal_60345aeb0dadf.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/69714145713zcybn.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/d0d64e44-f05b-4824-93a8-8e0f33657bba/49053221081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cbb5be2-43eb-41a7-aa24-285f27f58e8b/zawurilosazamipesenogur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b739674e-3326-44bb-911f-698ee8b22193/86502314716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650fb5aa-f94d-4599-a251-c587af5c3198/nogagojopobimo.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_off0000e2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DC 5168 bytes
SHA-256: f51f05c2d7dff0957a882ef9cc79c96173dca05878bade1c03fb2e40ac53864d
font_01_sfnt_off0000f46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46E 10684 bytes
SHA-256: 099d526b07da98dd0ce2b4879d0856db91252b3673093dc256ab22d800e4edad

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