Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbab7a2e2942021…

MALICIOUS

PDF

74.8 KB Created: 2021-02-17 18:12:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e3e46ad8abe41972a16c240b2b06e1c8 SHA-1: a4838e16844f41127cc652eb9a58bed664beb955 SHA-256: 3cbab7a2e2942021553c472e7e50d775242bf98c083fec5480c1b959655531ba
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, a technique commonly used for SEO spam or to redirect users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, with the PDF being flagged as a phishing trojan. While no scripts were explicitly extracted, the presence of numerous external URLs suggests a redirection or phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/strik?utm_term=can+animals+survive+without+air PDF link annotation
    • https://cdn.sqhk.co/pamavunawi/dQiitij/age_of_z_origins_level_15.pdfIn PDF document text
    • http://vuvefezod.iblogger.org/14547014272.pdfIn PDF document text
    • https://minojesifivu.weebly.com/uploads/1/3/4/8/134860027/lamulo-xixizofepubijav-punozokevidalaf-godewigem.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/xjd4Qid/hindu_devotional_ringtones_mp3_free_download.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/nosupovudiruvedu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_5fda2f17e242c.pdfIn PDF document text
    • https://nagiwavimev.weebly.com/uploads/1/3/4/6/134612684/9bd0e.pdfIn PDF document text
    • https://pafufido.weebly.com/uploads/1/3/1/4/131407890/22cc60f1808.pdfIn PDF document text
    • https://radumudoxelis.weebly.com/uploads/1/3/4/2/134235428/zipikoje-tisomolisil.pdfIn PDF document text
    • https://wotipivas.weebly.com/uploads/1/3/1/4/131482993/9353125.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/ieMia0u/kodak_color_control_patches_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451044/normal_600aabadcb4a2.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/sonokipuvivade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448343/normal_5febd08f73033.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5ffde220e7a6d.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/dfa0f4d14.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
    • http://rolugume.rf.gd/toxapatuzedawa.pdfIn PDF document text
    • http://kebanibaru.epizy.com/my_breakup_diary_images.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/baby_images_mp4.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD896 4980 bytes
SHA-256: f85dd8d3c87a8e3fc4f0e8a29b8420be12081be3e18d702567069ac33422869a
font_01_sfnt_off0000e96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96A 11472 bytes
SHA-256: 815901e5f432f304fe145e258d0fa5898597da3b80e79f132a50fb32281dad30
font_02_sfnt_off00010ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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