Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92b82d7a996650e…

MALICIOUS

PDF

85.3 KB Created: 2021-03-29 16:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e799a2d45dd88af556fac3a80c85d4ff SHA-1: dd53d821f462bcaef22b60d931adcc6d3ed4316d SHA-256: f92b82d7a996650e9ad76609c0f4799d93b330a25bb4d324db86311ed3b087a0
156 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 0.9997

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 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.
  • 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/wix?keyword=craigslist+hawaii+all+islands PDF link annotation
    • https://rajagoka.weebly.com/uploads/1/3/1/4/131406288/71377f39cd4.pdfIn PDF document text
    • https://cdn.sqhk.co/mokabawimav/hbmSjey/best_health_tracker_watch_for_elderly.pdfIn PDF document text
    • https://kijomexed.weebly.com/uploads/1/3/1/0/131069838/71292ac.pdfIn PDF document text
    • https://cdn.sqhk.co/wafavalufa/qqhi9ig/hmrc_online_tax_credits.pdfIn PDF document text
    • https://cdn.sqhk.co/tazarufavixa/gfifKWz/67101532130.pdfIn PDF document text
    • https://cdn.sqhk.co/vavefamixivi/jqifZig/social_guide_book_of_class_9_readmore.pdfIn PDF document text
    • https://cdn.sqhk.co/nenafodud/MijSBaG/dojutivo.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
    • http://ripajadiw.rf.gd/90063746305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4f1feb8-53b0-4f75-8116-b94be77f6b6e/xusozojulago.pdfIn PDF document text
    • http://musaluxug.rf.gd/formato_de_nmina_sencillo_en_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd9a513-fbe0-44ad-b8d5-eaaa87591968/sixebewabopogituxuluneze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbbd2fa4-4c78-40a2-8942-6a90f59b21fb/what_are_three_structural_differences_between_arteries_and_veins.pdfIn PDF document text
    • http://pakoxerevigere.epizy.com/6471601391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372ffbe3-e56e-43e7-a5f0-e8a2fb7611dc/how_to_identify_page_breaks_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33740608-0460-4eb6-a494-f0fda90c2810/xawurosori.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10379 4764 bytes
SHA-256: e2e1a714dc0302736632ee9a2ef131a7dae9d988b3c8d1379edf015c4ded3f6f
font_01_sfnt_off0001139a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139A 11544 bytes
SHA-256: 4e69751b457654efe44720e59b270d273f60bd339536b7e753a0c1e8a5d42594
font_02_sfnt_off00013a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A47 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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