Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c6937a34a7c04c…

MALICIOUS

PDF

69.1 KB Created: 2021-01-12 14:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ee144069834ade03f7e24bda97efe0c8 SHA-1: 7e7916cb16d13e8e6f7068287869b352845e1d0e SHA-256: 44c6937a34a7c04c0bd4c8a726fef2053a3ad511e3dc57ee1d3931d0f094e67b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to other PDF files, indicating a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

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://trafftec.ru/aws?utm_term=printable+blank+scattergories+answer+sheets PDF link annotation
    • https://site-1173313.mozfiles.com/files/1173313/score_hero_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/jawubibegeba/iPqxVjc/drake_n_trap_apk.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/160d49b.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/UIibUjY/mudonajujar.pdfIn PDF document text
    • https://ximetekorexuven.weebly.com/uploads/1/3/4/4/134489871/9468804.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/780967.pdfIn PDF document text
    • https://pamixame.weebly.com/uploads/1/3/4/5/134589616/zivovowugusejulanej.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/xonaxevetaf/gerurikeli.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/chips_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/vutegabubuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/attendance_system_software.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/adithya_varma_trailer_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/tropico_android_apk_free.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_off0000d3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A2 5360 bytes
SHA-256: 1fc1062ae47679ffd88506e6d3482125ff5c7e881ada9603507af08326432f9d
font_01_sfnt_off0000e5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E5 9780 bytes
SHA-256: 922ac45688bf2444c9e09d8bdea9439d9ec112f54d11e4c3b2e1b84c9e02abd3

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