Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e96280bd19988f7…

MALICIOUS

PDF

78.9 KB Created: 2021-04-02 01:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 96de72ac7ed051c25ac1f154e8145331 SHA-1: 9082f6f31b86930dae35ae374f97682474748ecb SHA-256: 2e96280bd19988f776519cd5d2c21b00838ecee0eca9a30ed86acdf57b2bdf4d
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are flagged as malicious or part of a link farm. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to dafemum.ru, which is known malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=measures+of+central+tendency+and+variation+worksheet+answers In PDF document text
    • https://jimukara.weebly.com/uploads/1/3/4/2/134235432/samadilogisazuz.pdfIn PDF document text
    • https://pupowoxixibigi.weebly.com/uploads/1/3/1/4/131438439/malidijapevixadikuso.pdfIn PDF document text
    • http://fenogavalos.iblogger.org/wabofidebunes.pdfIn PDF document text
    • https://pusenosegunilo.weebly.com/uploads/1/3/4/7/134705238/zubozedofomefitipoz.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/q8jbgek/angry_birds_dream_blast_mod_apk_unlimited_money.pdfIn PDF document text
    • https://wilixutisew.weebly.com/uploads/1/3/4/0/134095986/5305256.pdfIn PDF document text
    • https://viwuxujubefana.weebly.com/uploads/1/3/4/6/134625166/6bb6d.pdfIn PDF document text
    • http://rudeniwabirever.iblogger.org/african_american_history_textbook.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/cNQjhii/doom_patrol_review.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/dIgejha/surface_project_dawn_hidden_objects_games.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/die9Wge/41456960740.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/e2FQKif/sivogisegajavovidijiroj.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/fixararololu/kixuxibilulimexukexakeva.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/29470380038.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/men_s_formal_wear_stores_near_me.pdfIn PDF document text
    • http://tezepigemuxi.epizy.com/what_does_chb_stand_for_after_a_doctors_name.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/tetadokaxe.pdfIn PDF document text
    • http://temekem.epizy.com/application_forms_for_nsfas.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/final_fantasy_x_remaster_100_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/vopivijokazovesivalewero.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/forte_abrao_don_juan.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/huffy_cranbrook_bike_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/6153683515.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/94393280655.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/9525331296.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_off0000f718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF718 5432 bytes
SHA-256: eea623af175846c8ce51c926da22226af081c4768a7dccfa76c9bbdbbae47bc3
font_01_sfnt_off000109b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B3 10572 bytes
SHA-256: 7469a114e2f536b5c075c1c4dc56846e65c9b44c21656c741f0a64f969747ff6

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