Malicious PDF — malware analysis report

Static analysis result for SHA-256 745be1a38812b244…

MALICIOUS

PDF

73.3 KB Created: 2021-01-05 22:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9c538a8fb5787b9d7095fd0a51fc7b1 SHA-1: 968fb27ea37846e27277a03ffc78baf9bfad10d7 SHA-256: 745be1a38812b244307d8569b694ef8420573b040362086ac2bc1bd4f02897ea
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ClamAV detection and ML classifier also strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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
  • 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=super+tactical+droid
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/lomuv-bezile.pdf
    • https://xenofoko.weebly.com/uploads/1/3/4/7/134735933/b95c0dfa8.pdf
    • https://cdn.sqhk.co/tajiwikiter/gegihhp/xusugufurakixivojanelirel.pdf
    • https://sejaworobe.weebly.com/uploads/1/3/4/8/134865602/xerenet-vomova-favumipapobi-nejopi.pdf
    • https://cdn-cms.f-static.net/uploads/4407780/normal_5fa02ae02a1bc.pdf
    • https://zelogevoge.weebly.com/uploads/1/3/1/4/131483318/bopetu.pdf
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/gifabovatum.pdf
    • https://cdn.sqhk.co/baxemazisod/geWekPK/jovusozerilo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/5e179ebc-e828-4aad-876e-eb8c6baa46c0/95042485077.pdf
    • https://s3.amazonaws.com/takebemanijewok/ludeluzixomujulujefub.pdf
    • https://uploads.strikinglycdn.com/files/ad147017-5c05-4b48-b78e-db9406d0da1a/widuzowikaxifuzexe.pdf
    • https://uploads.strikinglycdn.com/files/5fa09fee-062e-4c5f-a65c-3b7a8b087e4e/werune.pdf
    • https://uploads.strikinglycdn.com/files/955798bd-ad9f-4f8f-8682-834ba97cbd22/jelotozivapedibijaxazij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6df.bin
9687f29d0e5f0a19df511f63bf5928de22088bbdd6a458b1b063770b39644175		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DF 4768 bytes
font_01_sfnt_off0000e719.bin
cf33495720ce72be844bdff46b4503ca3079e3d930b186e21150e21fa23614d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE719 10292 bytes
font_02_sfnt_off00010a3e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3E 4324 bytes

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