Malicious PDF — malware analysis report

Static analysis result for SHA-256 835d6ea46603270a…

MALICIOUS

PDF

73.7 KB Created: 2021-02-25 06:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 843fc4b96305923774c41b43d1396563 SHA-1: 26887223e1b82652d113c47981c4720121842b94 SHA-256: 835d6ea46603270ab563311b83036cf78cfd265b796fd9bbbf989a5e2d4fd3b1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, indicating a link farm or redirection mechanism. The primary URL points to a page that appears to be part of an SEO manipulation scheme, and the PDF itself contains numerous links to other PDF files hosted on various platforms.

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://leonvi.ru/123?utm_term=tappan+gas+stove+replacement+parts PDF link annotation
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/52c82a35dc3d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486213/normal_5ff3e00517dd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417327/normal_6025ae6696f0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_6019ac9a6d332.pdfIn PDF document text
    • https://latelolinowom.weebly.com/uploads/1/3/5/3/135333312/lewizokeliti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466376/normal_60141ec4df7cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_60326a881ee40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452148/normal_5ffb7a3d0b48b.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/gcgCXpY/47874632367.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/CeRqEid/27311361691.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458848/normal_6004899206364.pdfIn PDF document text
    • https://pepodefaposuv.weebly.com/uploads/1/3/5/9/135992330/8186fe690a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378852/normal_5fdecd5bd3ade.pdfIn PDF document text
    • https://tepidupelagoxu.weebly.com/uploads/1/3/4/4/134472529/8874835.pdfIn PDF document text
    • https://sizeduxaginota.weebly.com/uploads/1/3/2/7/132712537/5167500.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/kefiperizonofu/77923685691.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_off0000e517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE517 5260 bytes
SHA-256: feb0f300d0d87836687f50d73919afa3dac81a627e47dd9d7d564f3cc0618e60
font_01_sfnt_off0000f6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F6 10248 bytes
SHA-256: fa04d1eeddba2260767c0e4d57147738c1457e4d12a51de6f5ab380002f4ae6d

Open this report in the interactive analyzer, or submit your own file for analysis.