Malicious PDF — malware analysis report

Static analysis result for SHA-256 e73b7783d12095ad…

MALICIOUS

PDF

82.0 KB Created: 2021-02-24 15:32:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 88b1439b5fd9b3d54b1cbe3b4828455c SHA-1: d27f94c4c8fee80072dba2603deff528318b250e SHA-256: e73b7783d12095ade39b360cff749c139f20059622220cf525dfac7ebd0ce4b9
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. The embedded URL, 'https://jottigo.ru/award?keyword=how+many+books+of+fifty+shades+of+grey+are+there', suggests a phishing lure related to an award. While no scripts were directly extracted, the PDF structure and the presence of external URIs indicate a potential for malicious content delivery.

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://jottigo.ru/award?keyword=how+many+books+of+fifty+shades+of+grey+are+there PDF link annotation
    • https://cdn.sqhk.co/temirikuji/jhielOJ/10842508696.pdfIn PDF document text
    • http://copyright-notice-ig.com/prison_break_cast_season_1_lawyer5uvdb.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/jijdm8h/house_designer_fix_and_flip_hack_mediaf_re.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/97256886729.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/fevobelijogal/lukixoginiligazoki.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/how_to_sketch_for_beginners.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/apush_period_4_review_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/http_basic_auth_header_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/carnivores_ice_age_hunter_mod_apk.pdfIn PDF document text
    • http://devoleresi.rf.gd/luseg.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/13138860345.pdfIn PDF document text
    • http://ruvazopogidane.epizy.com/saxejupewodigavoroweloni.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/exploring_science_working_scientifically_8_answers.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_off00010330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10330 5648 bytes
SHA-256: f4133f09fc8ec2afc8b1ec44d251c1f90935aec5bbd888bef274f106c72ff663
font_01_sfnt_off00011654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11654 10624 bytes
SHA-256: bce734aefad10e1821bf70f86adbb1a288dd2746697724cf2290243443fddcca

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