Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fbdaaee9dc4b1c2…

MALICIOUS

PDF

74.8 KB Created: 2020-12-14 03:16:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: efbac49b810512dc57d74470e68002a1 SHA-1: 1701fd2d789456233cd23116378c52ad76df64ba SHA-256: 3fbdaaee9dc4b1c2d91d51acdcd31f9fa7bcae5cae6a2463c5a60f655c955add
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains an embedded URL pointing to a website that appears to be part of a link farm, likely designed to redirect users to malicious content. The PDF's structure and embedded links suggest an attempt to disguise malicious activity as legitimate content, such as a vehicle manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=1998+jeep+grand+cherokee+laredo+owners+manual PDF link annotation
    • https://xurafexejigaf.weebly.com/uploads/1/3/4/5/134588012/d0147efd24fb.pdfIn PDF document text
    • https://fitokuzigijot.weebly.com/uploads/1/3/4/6/134681543/wujuxitu.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/251261.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/jamijodipariruvat.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/moduxanakuri/kulefikifavuzuro.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/free_bible_journaling_printables.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/redalibene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ae2be7-8515-4137-8c87-5b854c82f353/90991789214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e986db9-f8d6-453b-9119-8a77fba48c09/didovuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/315c84de-910f-4d66-ba4d-2635ea2f0f60/90222769251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e9eb65-6c8f-47e5-99cc-03af8efcc0cf/airport_city_cheats.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/49123400754.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/rekule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ff6d74-bb49-4591-b70c-ede531071783/division_2_eagle_bearer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc9bddb5-b675-47b3-98e8-c3d407be048b/17767128424.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000101c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x101C8 18096 bytes
SHA-256: 050459d74b3b7841dbb69e37c3818cfc54f3f53046af1f12fbc7d0e6f6367fa2
font_00_sfnt_off0000ca3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3A 6024 bytes
SHA-256: f7d2e7f6d49af659f18aea5fcb6fdc8ccb265e443779c3b25898dc5b521753e7
font_01_sfnt_off0000deaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAA 10184 bytes
SHA-256: f1e80142f229385f5d0ef6f7f61bc183037a12390c180e1613a05a711dea1a08

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