Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c19a26ae50453bf…

MALICIOUS

PDF

81.2 KB Created: 2021-02-25 00:24:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1afb1131abbee707a2b2f5c8f68912c7 SHA-1: a0ea2c01331ec7a1732aa2df4c650af2a175eee2 SHA-256: 1c19a26ae50453bf141d293363337f34dc7dd6782ee46a50212518de39b7ffa5
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, and ClamAV detection as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to computer parts, likely intended to trick users into visiting the malicious URL. No scripts were extracted, but the presence of a malicious URL and the phishing lure strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=what+are+the+5+basic+parts+of+a+computer+with+pictures PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413968/normal_6012cd5c6bac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_6021bcb0c5ee9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_60207a619cbd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423166/normal_600f215a4c6ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391909/normal_5fe25a001ef00.pdfIn PDF document text
    • http://leree6.club/cats_cradle_eiffel_towerkzcda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385230/normal_5ffad6fb8240a.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/zemunomipazikez/infinite_legion_dark_caster_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/staff_appraisal_forms_child_care.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/razipoparadumu.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/android_auto_es_compatible_con_mirrorlink.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/chupke_chupke_movie_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/34954366787.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_off0000fec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC9 5592 bytes
SHA-256: 72960db4c645b2719bdf178bf0e308dc9d4deb2b04e4c6d22a4f11e7dfcc3a4a
font_01_sfnt_off000111c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C0 11020 bytes
SHA-256: fe9834ce30a2a280c3675f2e59b02b533f518a166aa1b819e717c2bef8b8edd8

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