Malicious PDF — malware analysis report

Static analysis result for SHA-256 83701ce882b583d8…

MALICIOUS

PDF

88.8 KB Created: 2021-05-16 09:40:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4bea4abed4822bc149b751668a2a8051 SHA-1: 3c735db7f18ef38079d423f55cc068b5350d7814 SHA-256: 83701ce882b583d82890c02856855f840bf651f38733a3e34b2f8b8bb05f59b4
156 Risk Score

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://botokaw.ru/strik?utm_term=baby+bjorn+travel+crib+dimensions PDF link annotation
    • http://zobebukore.22web.org/sesuwubon.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/gdjg7MO/89480802022.pdfIn PDF document text
    • https://verikadofaja.weebly.com/uploads/1/3/2/3/132303102/2178386.pdfIn PDF document text
    • https://giburonolunege.weebly.com/uploads/1/3/1/4/131406036/noboxixiwetidozogura.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdfIn PDF document text
    • https://rosowimibezot.weebly.com/uploads/1/3/5/3/135392622/rurifexe.pdfIn PDF document text
    • https://cdn.sqhk.co/lenubire/0khbidS/31002513984.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/hjRjjhj/silicon_valley_power_rebate_program.pdfIn PDF document text
    • https://fewabupa.weebly.com/uploads/1/3/4/5/134584226/ee0971cb0b30.pdfIn PDF document text
    • https://deriwofapavuz.weebly.com/uploads/1/3/4/3/134311795/vofiwerujufemo.pdfIn PDF document text
    • https://naletonuve.weebly.com/uploads/1/3/4/3/134381452/7e9bd19c66ae8f7.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
    • https://s3.amazonaws.com/faxaxos/rcog_guidelines_for_cervical_incompetence.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/duzumazo.pdfIn PDF document text
    • http://bitezopunofiwu.rf.gd/devilbiss_pressure_washer_pump_exh2425.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/55540848842.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/borges_arte_potica.pdfIn PDF document text
    • http://mirokukuvo.rf.gd/kadambari_novel_in_marathi.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_6e5d79b3ffd240c89e78a4a7f584136f.pdf?index=trueIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_07b610ee556141c9a458bf3c9e4bad05.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/pufobesijelovaranaxigamak.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_off00010f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F76 5300 bytes
SHA-256: d0563822454cafdc12073b61877d78ec006d13b83da756aca18efdd156f9e71d
font_01_sfnt_off00012165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12165 11556 bytes
SHA-256: 2483c9c642bb0a56b027e60790401d1bcd8385210d6fb393dbf70197890b2d58
font_02_sfnt_off000147e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147E0 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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