Malicious PDF — malware analysis report

Static analysis result for SHA-256 2808eff4ac5f5932…

MALICIOUS

PDF

68.1 KB Created: 2021-04-25 08:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60a77f3c3b876531206b2e4e335e6e88 SHA-1: 7be700893760d050211dfeadee50d222e1529d9a SHA-256: 2808eff4ac5f593244983803a1692a8cefd133b32a1ebc92ffc4b44c0e7034f0
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with the primary URL pointing to a suspicious domain. This strongly suggests a phishing or malicious redirection attempt. While no scripts were extracted, the PDF structure and heuristic firings indicate malicious intent, likely to direct users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=what+motivates+you+to+do+your+best+every+day
    • https://birifisak.weebly.com/uploads/1/3/4/4/134493055/kaninili_nexesilowu_fazamolelo_xojiwunona.pdf
    • https://cdn.sqhk.co/pinebiven/Kibicm8/robot_car_super_transforme_mod_apk.pdf
    • https://cdn.sqhk.co/dabebasavus/jfNhjhj/bevusuxexotunumexavab.pdf
    • https://static.s123-cdn-static.com/uploads/4455670/normal_5ff0e8edcf2f7.pdf
    • https://static.s123-cdn-static.com/uploads/4449603/normal_5fca64b238111.pdf
    • https://bemakidej.weebly.com/uploads/1/3/0/7/130739127/retigafafav_puvuned_jifisijibujavut.pdf
    • https://xalemutaxites.weebly.com/uploads/1/3/0/9/130969461/lavukowopo.pdf
    • https://cdn-cms.f-static.net/uploads/4482863/normal_605686acaefc0.pdf
    • https://cdn.sqhk.co/zekafomaze/fgdiiRm/stickman_shadow_warrior.pdf
    • https://cdn.sqhk.co/lekibapufe/eichfsv/78311399697.pdf
    • https://cdn.sqhk.co/tefozakozup/dgj1hhY/36064237074.pdf
    • https://botekajerojaj.weebly.com/uploads/1/3/4/7/134749353/kozimozukepos.pdf
    • https://cdn.sqhk.co/ledivure/hirxghh/flurry_animal_crossing_plush.pdf
    • https://cdn.sqhk.co/moxibusas/jjhhfha/zofufiwurifar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/afe00544-1a09-4edc-b471-17fb963d87a6/51184394674.pdf
    • https://s3.amazonaws.com/jotizifime/4568603799.pdf
    • https://s3.amazonaws.com/sowewazulejewi/aha_guidelines_hypertension_treatment.pdf
    • https://uploads.strikinglycdn.com/files/ab9d5137-9e81-43d8-b155-6715dd5996a0/vipamelesakijiwum.pdf
    • https://s3.amazonaws.com/lebaxa/is_yaddle_yodas_sister.pdf
    • https://s3.amazonaws.com/dutimajizowa/vumofegigevomo.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_off0000cda5.bin
38e46d9f6fe1789b5677d4c8632362317b402b0ec4bcc2cd616a487799a38b9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA5 5348 bytes
font_01_sfnt_off0000dfb6.bin
f074dc88d6f5ce7a58ef082c9c1cc65d7c9ff0ca9974ee2b24622f33aa29b9e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB6 10264 bytes

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