Malicious PDF — malware analysis report

Static analysis result for SHA-256 add1ba01fb48246e…

MALICIOUS

PDF

95.3 KB Created: 2021-01-03 04:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 35a742a2066c15fb4f75e8c6c77d4649 SHA-1: 9f644f4e6677bcc47822361ab07ffd860cc4d4d0 SHA-256: add1ba01fb48246e6502ef472606f29247bb786d1e204f1563dd7b9d153e205d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with the primary one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the nature of the links and the ClamAV detection strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffmen.ru/aws?utm_term=anlodipino+mecanismo+de+a%25C3%25A7%25C3%25A3o+pdf In PDF document text
    • https://mogewojelepa.weebly.com/uploads/1/3/4/6/134681452/8517847.pdfIn PDF document text
    • https://nopiwevupemaro.weebly.com/uploads/1/3/4/6/134653234/7242418.pdfIn PDF document text
    • https://jezinuva.weebly.com/uploads/1/3/4/8/134869759/8714851.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/jijichb/runofagemutevolew.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/1iiefgd/76660009191.pdfIn PDF document text
    • https://sovawetozinunur.weebly.com/uploads/1/3/1/4/131407226/sexapanorefadaz-xupiwezogafuf-xesalasaxezeb.pdfIn PDF document text
    • https://livakazogoje.weebly.com/uploads/1/3/4/6/134622539/keleraziwuxoxefix.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/wotodedaruzuk/neonatal_jaundice_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb955df8-fb4c-4aaa-9103-a390ae1514e3/temewaf.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/84329530597.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/wuwuw.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/edward_snowden_book_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_off00013291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13291 5696 bytes
SHA-256: b2f56df69bcbfd0dbf94067a6ed6e6573a486ecb52c38016b02d9f166f8b79ed
font_01_sfnt_off00014505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14505 14084 bytes
SHA-256: 194516e3defb0f0325e536586b265d9e773b4b35afb5269e187e392a99ec986d

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