Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45749861961958c…

MALICIOUS

PDF

67.5 KB Created: 2021-04-19 06:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 50542a93dad96c05b9923a24b28af046 SHA-1: 5c88fc5a7b4f641ce4a482b31e1f5a4e22a1ceae SHA-256: e45749861961958ccef3611a6a731584c7f74b5e3c3e8b2d11461f4192fa1271
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 0.9996

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://golowaki.ru/strik?utm_term=when+did+the+game+of+basketball+start PDF link annotation
    • https://cdn.sqhk.co/dalubevemex/bmxqghD/toxozapalax.pdfIn PDF document text
    • http://just-gopro.com/will_star_citizen_be_on_xboxjkvgw.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/allow_news_feed_targeting.pdfIn PDF document text
    • https://cdn.sqhk.co/solalokazili/jhOd7Q3/bounce_classic_game_download_java.pdfIn PDF document text
    • https://cdn.sqhk.co/paxabuxutujo/aLrThjl/40614880718.pdfIn PDF document text
    • http://visionnew.xyz/mubinelafajagowaphsrj.pdfIn PDF document text
    • https://cdn.sqhk.co/mixirulizab/thhibt7/7718621848.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/jSTYjgo/89951440487.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/fv8jaib/is_a_switch_leap_on_beam_a_c.pdfIn PDF document text
    • http://pedagodogiko.getenjoyment.net/auto_repair_business_plan.pdfIn PDF document text
    • http://profit-makers.club/85103424619vx800.pdfIn PDF document text
    • https://cdn.sqhk.co/taxodisilif/o8gfgcN/rolling_stones_logo.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/171WijI/25812390526.pdfIn PDF document text
    • https://cdn.sqhk.co/wazotifuk/gLkgDIC/xujodamukireniximut.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/tawemamedujilolqgif9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_0560a16e264b45298dad69cef386065a.pdf?index=trueIn PDF document text
    • https://f856bbc4-01c8-45e4-8891-a53c5ee59fd0.filesusr.com/ugd/8e827e_39159f0c11894400a43277ee5c7c1f01.pdf?index=trueIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_962ed52bb6bd424fb61dea40fb1c77cd.pdf?index=trueIn PDF document text
    • https://6da1ed31-7a22-45b0-8bc5-463d376071ee.filesusr.com/ugd/29fbaf_a39cdca0815f4f1ca3eb9421bef6264c.pdf?index=trueIn PDF document text
    • https://1794ee33-230d-455b-98b1-84d48067edce.filesusr.com/ugd/551769_2e26abd1f6024aa5a12c543217d8d42d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3bc9924-658f-40f8-8015-f7c9fdc3ac5f/femozedinutubujumovudufop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa827ce-8246-4ce8-9ee9-da2986486937/17715385763.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_off0000cbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEB 5536 bytes
SHA-256: 3e1e3b6668eca551841183469b5ac5c6b7ff98f7bc8cea041bd5fb04d8322d3a
font_01_sfnt_off0000dea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA7 10224 bytes
SHA-256: 34510009393113f23cd645fbe3c08953adbac93b5bfdfc0e23f9b4e974acc15e

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