Malicious PDF — malware analysis report

Static analysis result for SHA-256 0041d7c9e1a013b2…

MALICIOUS

PDF

81.9 KB Created: 2021-01-07 05:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ebe78670c4ce0fa81c84e0d492af293 SHA-1: 7c68bd52c1c1fe902cb619e8ad36cff465937a60 SHA-256: 0041d7c9e1a013b2b3062f9bb3730b746456e1728a78cb258225d2bdd02995be
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ggtraff.ru'. This URL is presented in a context that appears to be related to a summer camp, suggesting a phishing or social engineering lure. The ML classifier and ClamAV detection further support the malicious nature of this PDF, indicating it is likely used to deliver a phishing payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=alpine+school+district+clear+creek+summer+camp
    • https://cdn.sqhk.co/diwewiduvaz/jdnmgil/hungry_shark_heroes_2._9_mod_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4418178/normal_5fa0f84004e97.pdf
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f8ab176d594a.pdf
    • https://static.s123-cdn-static.com/uploads/4416140/normal_5febb65306cd9.pdf
    • https://cdn-cms.f-static.net/uploads/4391921/normal_5f99d98172088.pdf
    • https://cdn.sqhk.co/gujadozede/aljeEhb/punapafabidetekejujufape.pdf
    • https://cdn-cms.f-static.net/uploads/4408601/normal_5fbc8522eac70.pdf
    • https://cdn-cms.f-static.net/uploads/4464083/normal_5faf63d40ccf9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/71025e25-5867-4115-9949-c474d48e4b13/63363072662.pdf
    • https://uploads.strikinglycdn.com/files/cc1bb1d9-318b-4f74-9371-36e6475c1b06/rip_dj_screw_shirt.pdf
    • https://uploads.strikinglycdn.com/files/fd66fc94-573d-435b-bf8d-22f766d8928f/protoss_build_order_winter.pdf
    • https://uploads.strikinglycdn.com/files/6d87a3b2-aba6-4685-b54f-36c2db26f1fc/shopping_guide_cornish_maine.pdf
    • https://s3.amazonaws.com/dorobukasawituw/6748183207.pdf
    • https://uploads.strikinglycdn.com/files/22c8aa53-a507-4aa0-a4d1-11401452dbb4/75634161330.pdf
    • https://s3.amazonaws.com/kukupunopedon/ben_ten_alien_force_game.pdf
    • https://uploads.strikinglycdn.com/files/01f2470e-9e1a-4f50-b3ca-680316014022/ev_connect_logo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010281.bin
a15eec0995dc9293072442e26bcd6a09f239ae69aea8f90c1d5b9fee6c96973c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10281 5368 bytes
font_01_sfnt_off00011496.bin
7c8d2c5382afb6b005e376804d561327880f2bdc8641bb7132be1ccfba247112
pdf-font-stream PDF embedded font (sfnt) at offset 0x11496 11112 bytes