Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb8fa6532050599…

MALICIOUS

PDF

73.5 KB Created: 2021-02-11 02:33:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 90720bf8b5bbe986d51e4b248cfb88a0 SHA-1: ad951495bcbdbccdd32d4bc6398e1252fdf0c328 SHA-256: bdb8fa6532050599974f2e84c3684ef9fe427d7edeb2be961e2719aee74d4ee6
104 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an embedded URL that, when clicked, likely leads to the download of a secondary malicious payload. The document body, though heavily obfuscated, suggests a lure related to an 'orthopaedic intern survival guide'.

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://bologen.ru/123?utm_term=orthopaedic+intern+survival+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/fedovipawe/hgKjagc/the_loopers_boating.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/rjahcji/vine_soundboard_clean.pdfIn PDF document text
    • http://santecmb-sarl.com/5796470920nqipe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406777/normal_6016744136069.pdfIn PDF document text
    • https://cdn.sqhk.co/fekolisuzub/t25ghWD/tiludewupusomuzeb.pdfIn PDF document text
    • http://adyga.site/vr_wing_chun_trainerqh82j.pdfIn PDF document text
    • http://kino-vezde.ru/81364665540cjcjf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_6023ebb762142.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/jggdiiv/fuxoxolatizowejan.pdfIn PDF document text
    • http://vipadminler.org/logical_reasoning_questionsm8kac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_601b472673010.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/xijuxosisomuna/novixusobela.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/chained_to_the_rhythm_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/41983602857.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_off0000e380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE380 5504 bytes
SHA-256: 4668fd35fbf2fe4b57536d41bc4c6cf3bd822555c439e87ad2bcefa151cb6165
font_01_sfnt_off0000f639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF639 10180 bytes
SHA-256: c40a952126e444a991575c5c8b6b285177f57e0f5dfa000ff4556f59e3a759bb