Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f57ece19fd114a…

MALICIOUS

PDF

75.3 KB Created: 2021-03-26 09:50:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7c00ec13a78baa9541b64eea70915477 SHA-1: 0021589926e98a2f1d35833a20c25140aabc8304 SHA-256: 72f57ece19fd114a693a35d011273fa1efbf24a77f38d9f738051f4a7b83639f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/123?utm_term=email+writing+format+icse+class+10 PDF link annotation
    • http://xepidenad.scienceontheweb.net/is_134a_compatible_with_404a.pdfIn PDF document text
    • http://pamatidela.getenjoyment.net/42075383379.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_60446854042e5.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/gJsoDnh/47111167531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419849/normal_5fd929762ca8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455639/normal_604f4c97e6281.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/mossberg_930_spx_magpul_stock.pdfIn PDF document text
    • http://vukufitu.mywebcommunity.org/dovoban.pdfIn PDF document text
    • https://cdn.sqhk.co/liminekaj/bRievgg/agent_a_puzzle_in_disguise_walkthrough_chapter_4.pdfIn PDF document text
    • https://dexonakupo.weebly.com/uploads/1/3/4/6/134644734/petebut.pdfIn PDF document text
    • https://fafutetigav.weebly.com/uploads/1/3/0/7/130775448/lokifofukorene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_602c18a04c979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482882/normal_6048d0b882df9.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwolegu/fEjfhjE/how_to_answer_expected_salary_question.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462775/normal_5ff9b10663298.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/Bhjy3wC/gebonif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404966/normal_5ff88fe15b05b.pdfIn PDF document text
    • http://kepuxom.mypressonline.com/buruwalavetuligikovu.pdfIn PDF document text
    • https://tovamegudisolos.weebly.com/uploads/1/3/1/4/131411857/4205714.pdfIn PDF document text
    • https://cdn.sqhk.co/pegatorapo/ibG5Pgc/wellness_coach_jobs_asheville_nc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480414/normal_5fcb37536dece.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_602aeeb7b1764.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vutelubuvobu.rf.gd/xekololil.pdfIn PDF document text
    • http://pumuroxojab.rf.gd/bolsa_nacional_de_valores_costa_rica.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_off0000e9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BD 5444 bytes
SHA-256: b031b1a05d8d88b03aa4527f8ed793618e7789cd59d6671d7cdfc1826b71312c
font_01_sfnt_off0000fc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC47 10424 bytes
SHA-256: 4efc06ae654cf1e6699e9ed43af8e641fb0a3fa6485473bc6f7b5447c1b4ce10

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