Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b8fa8c933d6c13…

MALICIOUS

PDF

76.1 KB Created: 2021-02-15 06:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 28ec6eec4cb238a27fc11887cc024ff7 SHA-1: 878916f22df08bcbc154059724b20e7260fa0aa6 SHA-256: 22b8fa8c933d6c132cecad02569a8e75ecf3d0c3509915d7c3346c5bff75ee5e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to host a malicious payload or phishing page. The document body, though heavily obfuscated, contains text that appears to be a lure related to a "nih manual chapter 1500".

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://seumenha.ru/wix?keyword=nih+manual+chapter+1500 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450345/normal_5fe8ec1a0dd82.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/MAY5Agd/galaxy_watch_active_2_blood_pressure_accuracy.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/jjewicR/84502773742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_601bfa7b2385c.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/kih7Ija/fogasefegunor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451755/normal_5ff9c18dd69ba.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/io302gc/factory_inc._free_play.pdfIn PDF document text
    • https://cdn.sqhk.co/bowawugafux/jiY5xib/jawamus.pdfIn PDF document text
    • https://cdn.sqhk.co/rigidaluta/gfs8qol/vifadalup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bisazabe/create_biodata_for_marriage.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/artefact_projects_ltd_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/http_sscn._bkn._go._id_formasi.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/5298516687.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/accident_or_incident_report_format.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/zibexurezalowabisel.pdfIn PDF document text
    • http://bisopat.rf.gd/win_10_version_1809.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE074 5056 bytes
SHA-256: 2d048b112502b173f0414b30119c02025efa0f1cc206cbc53090a2575ab25973
font_01_sfnt_off0000f175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF175 10428 bytes
SHA-256: 9a78571d2c21a9d85f776c5fb45033de3d31669468055ea0d7174e5237e92f83
font_02_sfnt_off0001151b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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