Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be08d4bcf7622bf…

MALICIOUS

PDF

76.4 KB Created: 2021-03-22 12:05:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9ac3b16d342ae87d0b46f5556d1fda09 SHA-1: b3ab6a09782e1e12c5962b5cd4bf3467ab4cf8ef SHA-256: 0be08d4bcf7622bf00995cdf3624c69d089f4c0eb3e3e4dc89be5a0ada6e7e97
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 0.9995

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://xezojetit.ru/wix?keyword=md+emu+1.5+37+apk+full PDF link annotation
    • https://cdn.sqhk.co/rubuxupab/iOpjeln/21251374143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408878/normal_600a4350387d4.pdfIn PDF document text
    • http://mozujana.22web.org/6937847316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_6013bd1c1180c.pdfIn PDF document text
    • http://brumbum6.xyz/birakuladutakimyarm.pdfIn PDF document text
    • http://xexevigaje.22web.org/81607359518.pdfIn PDF document text
    • http://naturfresh.fun/85218124560mq7r5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451737/normal_600b9bd695b81.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/aptitude_test_career.pdfIn PDF document text
    • https://cdn.sqhk.co/juselivo/0hdijhj/mixajeri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390366/normal_5fe9d86b6f92e.pdfIn PDF document text
    • http://4d-5d.com/minecraft_1.7.10_modlar_indirdjrg9.pdfIn PDF document text
    • http://lavka-karamel.ru/gogubitepidanelavisazosiz0j0u.pdfIn PDF document text
    • http://allieshouseofhope.com/sekonic_l-758dr_digitalmaster24g8e.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/XtZxSPY/rezewekewobelafozoma.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/alfa_cetoanalogos_de_aminoacidos5su40.pdfIn PDF document text
    • https://cdn.sqhk.co/saligoliti/cUjfic6/jump_ninja_contact_number.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://derijumofode.rf.gd/ethiopian_grade_12_biology_text_book.pdfIn PDF document text
    • http://xibaxet.rf.gd/leather_background_hd_wallpaper_free.pdfIn PDF document text
    • http://dirazonun.myartsonline.com/nirozulu.pdfIn PDF document text
    • http://dexizijisub.atwebpages.com/17630977219.pdfIn PDF document text
    • http://fewabasutagit.rf.gd/understanding_annuities.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_off0000eda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA6 5436 bytes
SHA-256: 77a1c79715dffc7bd32830a8a07f1f69d150a8ddb305c66738bfb346bbf1f385
font_01_sfnt_off00010046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10046 10404 bytes
SHA-256: 78da719d5e1fc2d2039e8daa1e2b86cfe33a1a7eaafbd504f79759665b4f3131

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