Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2fdd3136c1769a…

MALICIOUS

PDF

75.0 KB Created: 2021-04-07 18:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9102a15d5bc8c5904359ddfe716e8073 SHA-1: d6b80b8bf84db5094085dd04c52a99a91611dc25 SHA-256: 9b2fdd3136c1769a3b5bcb500ff62b975fabd6c4ce5db0f106be113755345ab6
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains embedded URLs, with the primary one being 'https://xezojetit.ru/wix?keyword=great+combination+worksheet+answers', suggesting a phishing or credential harvesting attempt disguised as a worksheet answer key. No scripts were extracted, but the presence of embedded URLs and the overall detection score strongly suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=great+combination+worksheet+answers
    • http://sagedix.medianewsonline.com/18292333686.pdf
    • https://static.s123-cdn-static.com/uploads/4405904/normal_5feb7f0b594cd.pdf
    • https://cdn-cms.f-static.net/uploads/4444110/normal_606b09db06af1.pdf
    • http://gaberiwilovu.22web.org/cakewalk_sonar_8_manual.pdf
    • https://cdn.sqhk.co/fofateze/jgKsmBO/rewards_program_in_spanish.pdf
    • http://nerroba.info/linowozaduxivizizusow93ocs.pdf
    • https://static.s123-cdn-static.com/uploads/4368777/normal_5ff1923c6c6e0.pdf
    • http://org-fruit.space/39217796874yv41s.pdf
    • http://toolsbestpricemicrometer.site/21_day_weight_loss_challenge_appoengp.pdf
    • http://shortsomfj.space/rosetta_stone_faql0f83.pdf
    • https://cdn.sqhk.co/wikelere/1igSjfR/wilofo.pdf
    • http://lnstagramsupportlives.com/planeacion_de_computacion30c4o.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wujitotulofok.rf.gd/fuxodigos.pdf
    • https://s3.amazonaws.com/putelekireza/cognos_active_reports_tutorial.pdf
    • http://luxakano.rf.gd/85592933373.pdf
    • http://mekasesajiw.onlinewebshop.net/41342488943.pdf
    • http://fazafowunop.epizy.com/achilles_tendinopathy_rehab_protocol.pdf
    • https://s3.amazonaws.com/mixanaz/bootstrap_4_datepicker.pdf
    • http://desovizipelo.onlinewebshop.net/article_3_of_the_philippine_constitution.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b2.bin
6b673ecaf223fbc78f8aa94ae4f4654f9de85e208cfdbc6ee595f388732d4341
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B2 5332 bytes
font_01_sfnt_off0000fbbf.bin
063609cf8f1b0ec200940be94e9a96c783167495b726ebc267dc62c49a439ab1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 10308 bytes