Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0df5f0dc63431e…

MALICIOUS

PDF

70.1 KB Created: 2021-03-21 06:33:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 40dd8ddaa0ea2d37edb62c58274dffff SHA-1: c64785f75349c8a3161cc2381f8a43727d1806eb SHA-256: fb0df5f0dc63431e6696fa6faaa4e9f8d8590ac8c595d453359de16124214b2a
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 0.9998

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://ponafet.ru/wix?keyword=congress+scavenger+hunt+answers PDF link annotation
    • http://wamuwosola.mygamesonline.org/wamoreropuxetiwofe.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/rogibisuleniruju.pdfIn PDF document text
    • https://cdn.sqhk.co/dobajinorite/3gchecs/zijemajeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447630/normal_604d1f43c8b54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483075/normal_604ec4c9171d7.pdfIn PDF document text
    • https://cdn.sqhk.co/jetobatu/mzgjjjR/twisted_tea_alcohol_content_vs_beer.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/wd_250gb_my_passport_wireless_ssd_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404310/normal_5fe2f3248f346.pdfIn PDF document text
    • http://airet.space/dead_zombie_sniper_frontier_2018_hackbtzab.pdfIn PDF document text
    • http://kozugufasuroti.mygamesonline.org/historia_de_la_decadencia_de_espaa_canovas_del_castillo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376125/normal_5fe2f270e0b72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417426/normal_600c77e9954da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490529/normal_5fcd600b747f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403683/normal_603f906de710c.pdfIn PDF document text
    • http://novubelugalij.medianewsonline.com/asientos_de_ajuste_contabilidad.pdfIn PDF document text
    • http://vinograd.io/83812088310abltb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_fb4263c8759a418fadc707170c769c99.pdf?index=trueIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_cbdc568ea0a442359265731b00d9f772.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0B 5040 bytes
SHA-256: 7e2893524eb2db5f9a89131be05f882011955b0b9fd4509583da91802080b2b9
font_01_sfnt_off0000dd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD37 9332 bytes
SHA-256: ff35f4878049aade5f63afbc112cd9e7c39f0e43e55111c465ff0fcccd2274e0
font_02_sfnt_off0000fd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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