Malicious PDF — malware analysis report

Static analysis result for SHA-256 fede7977c5870aa2…

MALICIOUS

PDF

69.6 KB Created: 2021-03-18 03:00:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d0135e9d95644fc001aa55a93b23b5ec SHA-1: 44ce59f950aeda7d7675038e1bdac76386253506 SHA-256: fede7977c5870aa22f88d441deaeaf0cbc6e4cbfc43d1c465b7fce10495d50d2
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/123?utm_term=final+fantasy+brave+exvius+reroll+guide PDF link annotation
    • https://zudezujom.weebly.com/uploads/1/3/1/3/131384555/tulexipuzomima_zezikagobiguva_berojabenut_bagaw.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/baguwowabanixemuro.pdfIn PDF document text
    • https://girusetobar.weebly.com/uploads/1/3/1/0/131071114/05d95a.pdfIn PDF document text
    • https://zodukaveg.weebly.com/uploads/1/3/5/3/135345947/7427273.pdfIn PDF document text
    • https://rixuxakixolewe.weebly.com/uploads/1/3/1/3/131380342/ec60b1f3679.pdfIn PDF document text
    • https://diwuxofemuji.weebly.com/uploads/1/3/1/4/131407179/nusasanate.pdfIn PDF document text
    • https://warogowi.weebly.com/uploads/1/3/1/6/131606132/7166708.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/deathwatch_40k_codex_8th_edition.pdfIn PDF document text
    • https://xadamunakufadi.weebly.com/uploads/1/3/3/9/133986396/85daf65a.pdfIn PDF document text
    • http://wunuvuzixuxi.getenjoyment.net/momogutalemevirumi.pdfIn PDF document text
    • https://mulomaninivoxom.weebly.com/uploads/1/3/1/4/131437045/ef4bd00b51.pdfIn PDF document text
    • https://mugakosi.weebly.com/uploads/1/3/1/3/131379948/2781482.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/dd797.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/goneduzum/wimira.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/71813543946.pdfIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_67c398b6caf04c76a88b575ad59a3097.pdf?index=trueIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_f8635f65783b47649a53fc53982a827f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/ragnarok_eternal_love_guide_crusader.pdfIn PDF document text
    • http://wiloradakuno.onlinewebshop.net/10952072840.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/florida_llc_annual_report_filing.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_off0000d16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16C 5400 bytes
SHA-256: 74f80c8d72ec95600e10c9961109f2d9de5e9021a92e5c7767cbf87259e911d8
font_01_sfnt_off0000e3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3ED 10776 bytes
SHA-256: efd3353ded0ec9d334831fe3d88cef96e1aeb3a499b120193e6c72413af6154b

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