Malicious PDF — malware analysis report

Static analysis result for SHA-256 c233a907712112ed…

MALICIOUS

PDF

73.6 KB Created: 2021-05-21 06:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5b57c7870be9bca7d48e786979a75e5e SHA-1: 42b66f26e3369dbceccd51b28572c713c81a45cf SHA-256: c233a907712112ed19b4d1c28b3a87811e75ba34883dfa2f299d84766cb5421a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to Weebly-hosted PDFs, indicative of a link farm or SEO manipulation. The embedded content, though heavily obfuscated, suggests a lure related to a search query. ClamAV and ML classifiers confirm its malicious nature, likely as a phishing or redirection tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=cuanto+es+90+decimetros+cuadrados PDF link annotation
    • https://bivajeliju.weebly.com/uploads/1/3/5/9/135978375/9901376.pdfIn PDF document text
    • https://bisojobiregabo.weebly.com/uploads/1/3/4/5/134509607/wazate_malalutow_pesawunebefur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476943/normal_5ffac21440ad5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459478/normal_6010f3fc5b6c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383794/normal_5ff67aeb87865.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465556/normal_5ff38d19d9a06.pdfIn PDF document text
    • https://bazeliwelari.weebly.com/uploads/1/3/1/8/131857734/34e7074ab265.pdfIn PDF document text
    • https://sekugiwa.weebly.com/uploads/1/3/0/7/130739582/6190591.pdfIn PDF document text
    • https://suvenalopevoku.weebly.com/uploads/1/3/4/5/134510495/a906941ff5fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365652/normal_5fe3982473942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444630/normal_6058e69b8af31.pdfIn PDF document text
    • https://telixezudaridif.weebly.com/uploads/1/3/0/7/130775339/tulumosawamidu_limaraw_rubej.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/8390339.pdfIn PDF document text
    • https://migigagabigugam.weebly.com/uploads/1/3/0/7/130775968/tovanojiwovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379851/normal_600a0db1c00a0.pdfIn PDF document text
    • https://raxaregos.weebly.com/uploads/1/3/4/3/134363135/vumedawogirej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/godewumazek/10949726666.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/oecd_action_6_final_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/best_resume_templates_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/nancy_drew_movie_2019_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/economics_supply_and_demand_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/baarish_yaariyan_flute_ringtone.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD70 5256 bytes
SHA-256: b0cc44a0ea3bf9eae98dc9e0ffaff37b8e5712411410eef7141dfd8f798c9cec
font_01_sfnt_off0000ef2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2B 12236 bytes
SHA-256: 060331f90c109bcd9bf406a86a21f08c07261048ca9fb6d6824e69ee5a616388

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