Malicious PDF — malware analysis report

Static analysis result for SHA-256 0328d27130e30d87…

MALICIOUS

PDF

75.1 KB Created: 2021-06-07 02:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a3613d15bccfad5332df056cb5783b21 SHA-1: de2a5d41c779e41c2c888ef82b0d392bad9be298 SHA-256: 0328d27130e30d87c904dc37fbc2715dcd8d81e93b324403914df355a8a7638c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/pbw?utm_term=kingdom+hearts+3+official+strategy+guide+pdf PDF link annotation
    • https://lonojoxojiliw.weebly.com/uploads/1/3/1/4/131438577/kunobovax-tadimebeku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414341/normal_605690f320376.pdfIn PDF document text
    • https://gitikatul.weebly.com/uploads/1/3/4/7/134749175/b5a236439d4b.pdfIn PDF document text
    • https://nowitijot.weebly.com/uploads/1/3/4/7/134716658/a1e23a47a0c7.pdfIn PDF document text
    • https://tuwavuko.weebly.com/uploads/1/3/5/3/135394323/xarinebe.pdfIn PDF document text
    • https://wiwetone.weebly.com/uploads/1/3/4/6/134660192/ruzapufori.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387417/normal_6000c51e6b527.pdfIn PDF document text
    • https://lufokozu.weebly.com/uploads/1/3/4/7/134755413/bfe91599ce6.pdfIn PDF document text
    • https://zapikomamotal.weebly.com/uploads/1/3/1/6/131606370/jazatajulox-furukazejutove-kiwutaralo-nuziv.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/1733361009116b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_60263d0718d37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465907/normal_5fc7ed8566c75.pdfIn PDF document text
    • https://fuwidomanajano.weebly.com/uploads/1/3/0/8/130874101/pofawerotizuwuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490722/normal_6066e92ac54d3.pdfIn PDF document text
    • https://letimetijomez.weebly.com/uploads/1/3/1/4/131454560/95539f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_5fddb0801d578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480750/normal_6015de9d2a697.pdfIn PDF document text
    • https://katidifivova.weebly.com/uploads/1/3/4/7/134715674/vabovixisumu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4d83da2-bb39-4cdc-9d3d-7a2dbe31fdaf/dopenojikofuzesarabubipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90afecf-e0f6-4494-9679-849096a0b04d/machine_learning_explained_ppt.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_off0000e60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60C 5804 bytes
SHA-256: 6dafc945e274f4c20964f261bc6034fed2fc9de32d7cf9afd51750c5e6f355d1
font_01_sfnt_off0000f9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C1 10856 bytes
SHA-256: 6ffd29f50a9bd6506d9a4ec56aab84e21022f4f68e000f3a53c7de098695db14