Malicious PDF — malware analysis report

Static analysis result for SHA-256 614a7af412c98ebf…

MALICIOUS

PDF

71.0 KB Created: 2020-12-26 19:02:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 02ff318fd414b25ea565edc8f7c8b36d SHA-1: d202079d37c4c832586c7119092926d7ce4c46c9 SHA-256: 614a7af412c98ebf440d18877a5f745263bfb0b958007b4791b29bce62c649fb
214 Risk Score

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, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain metadata related to wkhtmltopdf and a date, suggesting it might be a generated document used for phishing or malware distribution. The presence of many external links, including to S3 buckets, indicates a link farm or a distribution mechanism for further payloads.

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://traffine.ru/aws?utm_term=lagu+bon+jovi+always+full+album In PDF document text
    • https://faxarumi.weebly.com/uploads/1/3/1/6/131606834/patiju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443598/normal_5f9da24e65cde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420037/normal_5f96264a176f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488090/normal_5fcceb53b8223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f89005ebf606.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388428/normal_5fa7211c01627.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/kavitokolezub/39957542364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14282c58-d8ac-4efe-8167-a6fdb26019f0/tagazeravojube.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/dolasal.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/parrot_ar_drone_2._0_manuale.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/riketesetuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cb26ee1-98cd-48b2-913f-ea8370557737/33251429984.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_off0000d636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD636 5400 bytes
SHA-256: 385c05e133559f27ad62d1f86b1e566065053c5de8502a14fbcf0af2af64a567
font_01_sfnt_off0000e8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B2 12048 bytes
SHA-256: efac17976ad148fa55b248a3c9d949a89959f40101ca6f532f4eb8a120a56df7

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