Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0624bf1f098db45…

MALICIOUS

PDF

82.0 KB Created: 2021-01-10 00:08:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7cab49de17563c1b37066815cdf5d9ce SHA-1: 75aebcab192cf2a80c59d75512326fa46dd9afaf SHA-256: a0624bf1f098db4556e6260d50f85a4d230e6cf1f5b7deceb3ea79cbbfeca76b
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/aws?utm_term=advice+for+the+bride+cards+answers PDF link annotation
    • https://site-1174676.mozfiles.com/files/1174676/rifuwawuvelanuliroxaxeku.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/9AicjcF/best_adventure_races_around_the_world.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/jihjijb/hack_disney_crossy_road_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/3yZosa5/faxefake.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/8hfgfqE/hustle_castle_rune_combinations.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/aihzBgj/sawofeloxugupulod.pdfIn PDF document text
    • https://site-1172092.mozfiles.com/files/1172092/have_a_slice_of_the_pie_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/Zxhfq7p/nonuma.pdfIn PDF document text
    • https://site-1226144.mozfiles.com/files/1226144/vocabulary_activities_for_elementary_students.pdfIn PDF document text
    • https://site-1168194.mozfiles.com/files/1168194/trash_compactor_manual.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/bezegoluzose/93586441256.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/marathi_comedy_movies_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/zeny_5-_1_cavitation_machine_manual.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_off00010274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10274 5360 bytes
SHA-256: 1b42f5185346a3fc75dea165641ea322b87d928e6c7ae58a726fcb56c9c7f6d4
font_01_sfnt_off000114bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BF 11284 bytes
SHA-256: c08f9a046912b0692029d9f428d27730b95adce6d1c8672e20a69fe575eab283

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