Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e04073afb14314…

MALICIOUS

PDF

88.0 KB Created: 2021-01-14 07:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 499bca23c29eef1a4c4ce65c048bfc03 SHA-1: da2e2c36bfcf01cf18bf009711640bc0c197c0f8 SHA-256: 31e04073afb143145d366667930650b39c4d07da9ad943e1e6aade5567522a6d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body contains text that appears to be a lure, and an embedded URI points to a suspicious domain. The presence of embedded URLs and the nature of the detection suggest this file is part of a phishing campaign, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/aws?utm_term=always+remember+us+this+way+live+performance
    • https://site-1190639.mozfiles.com/files/1190639/zimovoxadajogovakip.pdf
    • https://cdn.sqhk.co/vatuliwa/hdieuq9/69544476132.pdf
    • https://site-1179246.mozfiles.com/files/1179246/road_trip_planner_western_canada.pdf
    • https://site-1182082.mozfiles.com/files/1182082/82726016427.pdf
    • https://cdn.sqhk.co/befozaxulot/libbHFP/angry_birds_blast_island_download_for_pc.pdf
    • https://site-1177303.mozfiles.com/files/1177303/sopawe.pdf
    • https://site-1172329.mozfiles.com/files/1172329/nolopabozizep.pdf
    • https://site-1083781.mozfiles.com/files/1083781/highway_gore_point.pdf
    • https://cdn.sqhk.co/togokitaz/YcnwhfJ/23854414689.pdf
    • https://site-1174576.mozfiles.com/files/1174576/claim_assignment_agreement_template.pdf
    • https://site-1168232.mozfiles.com/files/1168232/88675832976.pdf
    • https://site-1168108.mozfiles.com/files/1168108/devil_and_angel_images_free.pdf
    • https://cdn.sqhk.co/nuwezomu/anajghl/81639507808.pdf
    • https://site-1176294.mozfiles.com/files/1176294/kikkerland_design_rainbow_maker.pdf
    • https://site-1173433.mozfiles.com/files/1173433/anonymous_wallpaper_4k_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/luxelula/wowopebeluve.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112d2.bin
a8bfe8064c0f995fc7cb279ec5c75d8a1863db91334beb57cdf568f0b11f5e06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112D2 5636 bytes
font_01_sfnt_off000125f1.bin
c47c540e9f10bc77ecd62d9e4ffcdc39f96801d77f35b9808c8d2f35530007be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125F1 13636 bytes

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