Malicious PDF — malware analysis report

Static analysis result for SHA-256 212583fcff442bf5…

MALICIOUS

PDF

80.2 KB Created: 2021-03-18 14:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e69dd37971be57bec0bddea94ce01e1c SHA-1: 9b48df6ddfcdfdfd692d826d4aded72e1760e1d8 SHA-256: 212583fcff442bf56092ef80f1398c1a9efd3e2c018117057aa17c4fc98debd8
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 0.9998

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 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://dafemum.ru/aws?utm_term=how+to+access+camera+settings+on+iphone PDF link annotation
    • https://cdn.sqhk.co/webuzifinuno/6ajgkXB/4507679745.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/JhcgeVE/fibaluroxefipaxumuravafik.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/68UacSZ/paintball_usa_holbrook_ma.pdfIn PDF document text
    • http://springital.fun/what_is_another_word_for_after_sale_servicecahp8.pdfIn PDF document text
    • http://lidlid.xyz/citing_newspaper_articles_chicago_manual_stylejyquq.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/ghchghc/taurid_meteor_shower_2019_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/wavudasawete/KihqCkJ/jejipovabe.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/iihggSz/emoji_stickers_whatsapp_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/banifiga/ijjdkSw/tiki_taka_soccer_miami.pdfIn PDF document text
    • https://cdn.sqhk.co/gokovolasula/iehgicl/spongebob_moves_in_mobile_game.pdfIn PDF document text
    • http://boevoenlp.com/646385359529jec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_fdaa58b0628945c7b3a2645fb0679d4f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d064fd8-174f-42d6-a904-03e2efe34d1c/from_journal_of_the_first_voyage_to_america_critical_reading_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/609d334a-6955-4f4b-ad69-cd52e06e374d/que_es_un_proyecto_de_investigacion_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c3b2e8-e440-4365-bc70-29dcb59983a4/finudemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147f03ea-29a8-4752-9bff-258bd0788144/black_boyfriend_jeans_fashion_nova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb8ca98-176b-4582-81f3-262a40116bf3/xutaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f1a5fd-cb0f-4e07-92a0-664ed86272ef/tzumi_pocket_juice_4000mah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e802bad4-7787-489b-8f34-0f83b564ac7a/metorijor.pdfIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_78c4f73d0b6341a4805b5b1cf36612a6.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 5368 bytes
SHA-256: 2a838a3ca55fef5b522e3c53157cfa35ad20df7f7ec8384b224fe322f809ec87
font_01_sfnt_off00010de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE9 10476 bytes
SHA-256: d53d4e27e56195203e9cf9d18826b6f3f82560db1ea1e559cfe766c22be25f85

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