Malicious PDF — malware analysis report

Static analysis result for SHA-256 92dbc0419d81c6ab…

MALICIOUS

PDF

87.2 KB Created: 2021-05-24 00:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0bd39127013518c02b80547cec187aae SHA-1: 29e00f4ff0daddd1b866cc3992a2723d78e82109 SHA-256: 92dbc0419d81c6abb8b0166a94b5902ca81ba110abf23e89ce60ea24032aa0fe
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URL points to a suspicious domain, likely serving as a lure for malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=imagenes+para+desear+una+feliz+navidad+a+mis+amigos PDF link annotation
    • https://nixovutak.weebly.com/uploads/1/3/1/4/131406963/93e2ebde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446019/normal_60353553ef65f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5fe24046ce084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462059/normal_605f36b09da8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530171/normal_5fd8d12d1e92f.pdfIn PDF document text
    • https://vavaxomutiposev.weebly.com/uploads/1/3/0/7/130738712/rafukidanazozoz.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/vukixup-vubazulenar.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/fajixe/jefiwegirep.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/61102444826.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/68518341586.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/93786785535.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/how_to_get_full_minecraft_java_edition_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/firisexaxilal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb959b78-21ab-43f0-920a-daaf60706b40/lateral_thinking_meaning_and_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/unduh_asian_dating_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/ninja_foodi_blender_target.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/890a4023-2cc1-439a-9c49-4a342d6cf83d/73137991213.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_off000113bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BB 5408 bytes
SHA-256: 41055cf2837353471f2f847765513618a002fc7bfbaeb79a03d1b1e15f8d013e
font_01_sfnt_off0001261c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261C 12140 bytes
SHA-256: 3a28dca689c52e4d794e49e62a6727531ee7f7d045d702792dd20f06fcbce3e1

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