Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76f600e8c57fe6b…

MALICIOUS

PDF

79.2 KB Created: 2021-03-15 21:45:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c37dc8d60f008d5e38b81c5570777ba SHA-1: 5895519c4f045da6002519730ae7f927fa16f9f1 SHA-256: d76f600e8c57fe6bfe880bc515f610720b908452cc8754f5c493c08a2f783fe3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other file-hosting services, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=netgear+gs308e+review
    • https://tisivuvuzudopur.weebly.com/uploads/1/3/0/7/130738638/3490851d5.pdf
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/solebusuzex.pdf
    • http://inertbhjbj.ru/linurodojumodubezeravgmr2.pdf
    • https://folixesu.weebly.com/uploads/1/3/1/4/131453530/pazujitobupekigir.pdf
    • https://lomameleni.weebly.com/uploads/1/3/4/5/134597964/9212990.pdf
    • https://wumotobu.weebly.com/uploads/1/3/4/3/134370577/pupabalusiko-kujidop.pdf
    • http://life50it.pro/book_reader_pro_apkpure76p3t.pdf
    • https://cdn.sqhk.co/zudusidesu/jgh4geX/27372209819.pdf
    • https://cdn.sqhk.co/tememagitapo/hfeGAtK/nick_cannon_wife_now.pdf
    • https://norasavunoga.weebly.com/uploads/1/3/0/8/130874384/bbccaf178eda.pdf
    • http://clubstore.info/which_beard_trimmer_is_bestee3oa.pdf
    • https://cdn.sqhk.co/molavagew/ejhNify/happier_living_address.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_d7579a778749458b91e7e3426c64ee95.pdf?index=true
    • https://s3.amazonaws.com/xeroguru/australian_army_hurt_feelings_report.pdf
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_710f8a32382742079de014e77826f87f.pdf?index=true
    • https://s3.amazonaws.com/befafuni/compass_learning_odyssey_teacher_guide.pdf
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_713aab47136448d595062a76a311d74e.pdf?index=true
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_fc0afb2b79ed4d7abaea6a83aca261a9.pdf?index=true
    • https://s3.amazonaws.com/vixuwogetiv/firewall_palo_alto_datasheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea07.bin
1bfbcce37598075e848c033d965a12e3705f099914881cadf2e76f391dcd3ee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA07 5012 bytes
font_01_sfnt_off0000fb32.bin
43a219f1b48506c77be1a0ba188b4359efaa1e1422da757d4c8636c3ae970909		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB32 10972 bytes
font_02_sfnt_off00012087.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12087 4324 bytes

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