Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e55e723066d0067…

MALICIOUS

PDF

69.5 KB Created: 2021-03-29 11:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 517c0ee4bea511b955f8085fc5c32714 SHA-1: dbf787abc6f01ab382f8afbdf09c9df223109378 SHA-256: 0e55e723066d006797e62a128788b8898c09df8d85cdecbcc57e06c338d719fa
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://pelibifir.ru/strik?utm_term=download+al+quran+audio+30+juz+full PDF link annotation
    • https://cdn.sqhk.co/fasegibuniz/e1moLjj/border_patrol_agent_job_qualifications.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/sgcdxji/amc_the_walking_dead_season_11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404733/normal_6058dd892dcbb.pdfIn PDF document text
    • http://lotto-investclub.com/free_drawing_apps_for_pc_no_downloadt7unb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416132/normal_5ffd6b6dbcdc1.pdfIn PDF document text
    • https://xonedanafesiliw.weebly.com/uploads/1/3/4/6/134633415/fitogajol-juxodisiwozil-vuledi.pdfIn PDF document text
    • https://bofubesal.weebly.com/uploads/1/3/5/9/135958810/5112140.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/hhxbJDs/woodland_animals_coloring_pages_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427095/normal_60370f7b2b8bb.pdfIn PDF document text
    • https://cdn.sqhk.co/duvetezoje/j8rhABW/1281244975.pdfIn PDF document text
    • https://cdn.sqhk.co/naxusepimosa/b81an4J/fortnite_mini_game_code_pc.pdfIn PDF document text
    • http://helpforteam.com/56873688609l0r1n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495684/normal_6047df4fd4f97.pdfIn PDF document text
    • http://liketime.fun/the_phases_and_warning_signs_of_relapse_independence_presssq7sl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496592/normal_60225c86a0d7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467043/normal_6044616af3fa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454164/normal_5fe98473ad660.pdfIn PDF document text
    • http://takipleskazan.org/vamuvedoxoraxasokidenaj5enjh.pdfIn PDF document text
    • https://cdn.sqhk.co/luginuwi/iibFUjd/22009120481.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BC 5372 bytes
SHA-256: a9c9c424a289e4e78e3ef66acf77b94cdcee05eaa559b6c58e1f51b0fa553e4a
font_01_sfnt_off0000e336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE336 10488 bytes
SHA-256: dc9f67ac40e6e00520eea8e8795eb784292c495cd761701d40cbcee5edcd2378

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