Malicious PDF — malware analysis report

Static analysis result for SHA-256 001c6a402e33af4a…

MALICIOUS

PDF

82.4 KB Created: 2021-03-31 12:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 996e2538d87b29b9b266465fcd8b62a7 SHA-1: 732decf3df1b9c53d43ca9b9a2dc263a04f0a7b8 SHA-256: 001c6a402e33af4ab18fe6a1c9523f8fc5709c8c2d7211d195b84ae25f5e34a2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the presence of numerous external URLs points towards an attempt to redirect the user to malicious sites.

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://pelibifir.ru/wix?keyword=red+oleanders+pdf
    • https://cdn.sqhk.co/feguzuvubut/bjd4ggC/baby_maker_predicts_baby_face.pdf
    • https://cdn.sqhk.co/wenudiwome/jv0hjhe/appium_studio_for_intellij.pdf
    • https://cdn.sqhk.co/gitovera/g2iiBid/android_secret_codes_for_sportybet_apk.pdf
    • https://lusogovo.weebly.com/uploads/1/3/4/3/134358567/javijejive-kadopu-vidofafan-gisomuwenesu.pdf
    • https://kawavaturitavo.weebly.com/uploads/1/3/5/3/135321378/512f74bcb6a0a.pdf
    • https://lazogipinu.weebly.com/uploads/1/3/1/0/131069887/gakiz.pdf
    • https://vusowixaxepuw.weebly.com/uploads/1/3/1/3/131381533/solarukiretezixakam.pdf
    • https://renixopofofof.weebly.com/uploads/1/3/4/4/134486295/wamijowuw.pdf
    • http://boost-shop.xyz/powukudebafevimsrr8.pdf
    • https://vukuzimina.weebly.com/uploads/1/3/4/1/134109202/7b139bdc.pdf
    • http://wunadimizurened.medianewsonline.com/nerojetiwiwerodeduxafar.pdf
    • https://rupusuji.weebly.com/uploads/1/3/4/8/134878943/darobaketat.pdf
    • http://7lessons.site/conan_exiles_set_priest3b5pa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e5e0ff02-8d5a-43c4-b90c-fdda274a3895/tuzadejonipuvo.pdf
    • http://zezofakarol.myartsonline.com/antenatal_period.pdf
    • https://uploads.strikinglycdn.com/files/17f955e2-d9a9-4f62-b871-d09acbc09410/49006794839.pdf
    • https://uploads.strikinglycdn.com/files/5c25edfe-388c-446f-8275-e0a235898efd/39718072527.pdf
    • https://uploads.strikinglycdn.com/files/3f795e29-12bd-44ee-867b-337c6caf0330/jitefilujubipesor.pdf
    • https://uploads.strikinglycdn.com/files/08f146dd-23b5-406a-a2c3-998dffde1146/14514471081.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_off000104ab.bin
cea6f1b87b8a7da65ae905aa2d1144516d591be07fb25202cae561c65bdd25c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104AB 5040 bytes
font_01_sfnt_off000115df.bin
3915c9e60aa025be1515b4af9f645d5ff2b74e42a289ec2314e8b91293144f2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115DF 11372 bytes

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