Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2cd29fb966a23e6…

MALICIOUS

PDF

108.4 KB Created: 2021-04-15 13:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acc2595d8e0c70466120d99d98da0745 SHA-1: 7f1b59bf8db0b2befe7a22b92dedabf5e763931c SHA-256: b2cd29fb966a23e624a230839803030f16b571d53242a0f53de7605474888fba
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. One such link is https://zajinet.ru/strik?utm_term=vocabulary+test+maker+fill+in+the+blank, which is likely part of a phishing or malware distribution campaign. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics further confirm the malicious nature of the file, indicating it is a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=vocabulary+test+maker+fill+in+the+blank
    • http://submonster.xyz/29849865776dqn3e.pdf
    • https://munerojepoges.weebly.com/uploads/1/3/4/0/134042508/d6bb439922bf24.pdf
    • https://pozajuraxox.weebly.com/uploads/1/3/4/5/134591712/132474.pdf
    • https://cdn.sqhk.co/teposodigar/5iadief/learn_unity_tutorials_learn_game_development.pdf
    • http://kefets.xyz/how_to_study_for_the_network_exam2xz58.pdf
    • http://idealslim-italiaofficial.site/21577504125lwapa.pdf
    • https://lodokevez.weebly.com/uploads/1/3/4/4/134476034/filadebe.pdf
    • https://cdn-cms.f-static.net/uploads/4486051/normal_603370fa5a525.pdf
    • https://static.s123-cdn-static.com/uploads/4453118/normal_5fc95f118acaf.pdf
    • https://cdn.sqhk.co/lijusute/vjemVVg/mafigezagerefutetej.pdf
    • https://rinadulig.weebly.com/uploads/1/3/0/7/130739308/desoxagunes.pdf
    • https://tesegedoveveda.weebly.com/uploads/1/3/4/8/134891870/5630f27e3b038b.pdf
    • https://vopuxobud.weebly.com/uploads/1/3/5/9/135974080/6113044.pdf
    • https://cdn.sqhk.co/jewimebobi/cBhejC5/photo_editor_app_for_pc_windows_8._1.pdf
    • https://cdn-cms.f-static.net/uploads/4387826/normal_605f44e21b746.pdf
    • http://vovality.club/reflection_mulan_viola_sheet_musico8lgr.pdf
    • https://wivovisewisapu.weebly.com/uploads/1/3/5/9/135963584/2865852.pdf
    • https://cdn.sqhk.co/nomelafu/kyHicjg/fake_video_chat_app.pdf
    • http://sbrf.link/dominos_philly_cheese_steak_pizza_calories_thin_crustf053e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/veraxawewib/desh_bhakti_geetalu_naa_songs.pdf
    • https://s3.amazonaws.com/dabatisew/27736954275.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001556b.bin
a082a5bf201db060361c5c7ca7620c6d7cd17097b8cf41f11330d8db8a1686db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1556B 5392 bytes
font_01_sfnt_off000167a7.bin
3e115bad9a7ed605740214a0525d32693b1d2bf320b5a613a8497e700f0dd8b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x167A7 11572 bytes
font_02_sfnt_off00018f34.bin
2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18F34 16060 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.