Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba3ffe1801e7097…

MALICIOUS

PDF

75.3 KB Created: 2021-02-16 02:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b65ed055a0f437fd38e106fd38975ccb SHA-1: f07d90adef6c8cd60adcbf70895680eff276998e SHA-256: aba3ffe1801e7097c1a9f8923da1cdcece78fbf906d603be10f50874a4fbbab1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, characteristic of a link farm, with the primary purpose appearing to be SEO manipulation or directing users to potentially malicious content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest this attack pattern.

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/strik?utm_term=mclane+edger+carburetor+gasket PDF link annotation
    • https://pelunukemuf.weebly.com/uploads/1/3/0/7/130776607/jurakuvovo.pdfIn PDF document text
    • https://gedowejokose.weebly.com/uploads/1/3/4/0/134040639/821f69b43d7.pdfIn PDF document text
    • https://zikamesezelili.weebly.com/uploads/1/3/4/8/134857079/1216803.pdfIn PDF document text
    • https://pamokevavazodo.weebly.com/uploads/1/3/4/3/134386981/lozoxoku-wesefasuz.pdfIn PDF document text
    • https://vitovoraf.weebly.com/uploads/1/3/1/1/131164311/742279.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/ihgcibF/letililogiv.pdfIn PDF document text
    • http://topcabinets.xyz/beboncool_bluetooth_controller_manual1ayy3.pdfIn PDF document text
    • https://zorisurirumu.weebly.com/uploads/1/3/4/6/134600588/4517395.pdfIn PDF document text
    • http://noverst.xyz/remove_password_from_excel_2016_sheetqetgp.pdfIn PDF document text
    • https://zixojubagever.weebly.com/uploads/1/3/4/6/134613499/3d8bac7953.pdfIn PDF document text
    • https://wimofitadaxota.weebly.com/uploads/1/3/4/3/134362004/69bb8db9efd74.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/rolefosiju/experience_certificate_template_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/48191192250.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/10473646737.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/call_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/brca_testing_guidelines_acog.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_off0000e982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE982 5316 bytes
SHA-256: 8253765a892198135960fe171ca6ad25ba6d9b2f6c88f9024ab81274300632d4
font_01_sfnt_off0000fbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAE 10664 bytes
SHA-256: d7cbb7dcb7f2dcf9da3dcba0e8c02c22d6ee5bce8b5d8e5f662a8c1715359af7

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