Malicious PDF — malware analysis report

Static analysis result for SHA-256 af8d7c8ad7ea6c56…

MALICIOUS

PDF

66.1 KB Created: 2020-11-13 08:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2e40fde2f6ef3ec4e62fd377cabc3ed9 SHA-1: 10285fe19b382edba1f415709ae9852ff10fec25 SHA-256: af8d7c8ad7ea6c56081a641c0917df492f406b1305f7385fa7b91484e3a7ef23
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/aws?utm_term=synthesis+of+acyl+chlorides+chemguide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5f8e6c14c41ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391620/normal_5f8e6255dd751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f9640e0e66bf.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/memobofilenabon/nanezekedadezom.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/a_cut_above_tree_service_englewood_nj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d106e5e-fe5a-4ec1-8fbd-94c211e9457c/20182047447.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/zalawopiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc9441d-84d2-40a5-bade-8fb2b5db2804/89035095852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/416e1ca7-5740-4e36-8282-0647bda1d52d/dujojefuka.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/panamax_m5300-pm_internal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf38b88-0eeb-40e5-9dbd-acb1373c463e/jaxugedelubiseparevaxixix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c08cf5e-7895-449a-9228-3bf7e17bb1b8/lemupedipejurowaxilux.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/reddit_fgo_guide.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_off0000c43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC43A 5640 bytes
SHA-256: 960fddcf64d7363a5d5dae04e0993d900b29f82c0fad02e6746e5d7c39c4b14f
font_01_sfnt_off0000d744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD744 10660 bytes
SHA-256: fd31723a4d4efc00dda74021e6fafe47c23642acc554d51eed061ceffb6a644e