Malicious PDF — malware analysis report

Static analysis result for SHA-256 c006507ad236a85d…

MALICIOUS

PDF

75.9 KB Created: 2021-03-05 14:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 677c10f77aa27c891f5b5f81ff434950 SHA-1: 9db98b83186de24d2883fae99292cd278e63e330 SHA-256: c006507ad236a85d037a4f846cd484a1565ae29043ce9baf76ad090ada968e99
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 free hosting services, suggesting a link farm or SEO abuse for phishing. The ClamAV detection and ML classifier strongly indicate malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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-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://zajinet.ru/wix?keyword=republic+michigamme+schools+employment
    • https://javedaxefu.weebly.com/uploads/1/3/5/3/135314095/wevog.pdf
    • https://zuvofuguwapu.weebly.com/uploads/1/3/4/0/134042474/tozij_wuwavenu.pdf
    • https://cdn-cms.f-static.net/uploads/4475570/normal_6022bb0763cb1.pdf
    • https://cdn-cms.f-static.net/uploads/4413564/normal_60372da5822f0.pdf
    • https://vumukawa.weebly.com/uploads/1/3/4/6/134662430/dazepepexepod.pdf
    • http://rerulekoba.66ghz.com/kowoxavegipiwusebar.pdf
    • https://cdn-cms.f-static.net/uploads/4419415/normal_603171570a96d.pdf
    • http://gewugonuwo.iblogger.org/plot_diagram_explained.pdf
    • https://cdn-cms.f-static.net/uploads/4459477/normal_60199d14f41f5.pdf
    • http://nibofope.66ghz.com/inspector_alleyn_mysteries_episode_guide.pdf
    • http://femojel.iblogger.org/samsung_phone_turns_on_but_no_picture.pdf
    • https://cdn.sqhk.co/wujamufaw/f0cojcq/spiral_christmas_tree_outdoor_decorations.pdf
    • https://bibixofepo.weebly.com/uploads/1/3/4/2/134235383/tumovevesuvavosux.pdf
    • https://cdn.sqhk.co/xujuvotu/e4ieJGc/summoners_war_rune_optimizer_proxy.pdf
    • https://nowatipuzovatob.weebly.com/uploads/1/3/5/3/135397830/2614147.pdf
    • https://cdn.sqhk.co/jumifokujuje/didihii/bazewabogesenat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_25de3bfc6f284f879d67500eb074288a.pdf?index=true
    • http://muvelexadaw.epizy.com/max_bundle_size_android.pdf
    • http://kibululugavi.epizy.com/5724689315.pdf
    • http://livufuxe.epizy.com/best_smart_watch_under_5000_in_india.pdf
    • http://gulaguwiz.rf.gd/50677390120.pdf
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_c99f6d16c3134375829cc98f59c2aca3.pdf?index=true
    • 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_off0000db9c.bin
866f61a53f7324acf72263e9e49132c6c8e9fda11ef7d904933b0a41079f8205		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9C 5380 bytes
font_01_sfnt_off0000edd0.bin
0d26d7111c05be791f2264c7ece23f418b2f1e3c9249947d891da49fb0f62d88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD0 11168 bytes
font_02_sfnt_off000113fa.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113FA 4324 bytes

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