Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb961ac67e2b867…

MALICIOUS

PDF

64.3 KB Created: 2021-01-02 12:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3b152b0209eb186dad7c3ca6bcc7de07 SHA-1: 75314b0574dc11b3279a9eb5b8df986bc00ae55a SHA-256: aeb961ac67e2b867dfa97522a4b4c7e85814ad92f139b873d01b740b91b18282
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, which is likely used to host or deliver a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'Briggs and Stratton 450 series rotavator manual', indicating a phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/aws?utm_term=briggs+and+stratton+450+series+rotavator+manual PDF link annotation
    • https://cdn.sqhk.co/bovavadas/XLdRmIz/42631239451.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/TZ8wGxT/17150939740.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368958/normal_5fdecbd53e859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460682/normal_5fb9cb088c972.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449984/normal_5fc8fb80b0be7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e26c6fd-e5f4-4fd5-9afe-09cad4e5ebd0/purolator_filter_cross_reference.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/edgewood_elementary_school_selma_al.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/the_adventure_zone_graphic_novel.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/babu_mera_gana_chala_do_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tefelaj/33631567306.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/kunta_kinte_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d683da2-2cdb-43ca-b34f-078bc0979e3a/asakusa_culture_tourist_information_center_tokyo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd8c3526-d997-4f92-9ce7-77c964ac4f16/tevasexarazasanojiwifoj.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_off0000bc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC36 5608 bytes
SHA-256: 682e1d21fb38c877e20cd8f3b50a73eb24d6656f6b4d634510d20e72d817da6b
font_01_sfnt_off0000cf4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4E 11100 bytes
SHA-256: 31203d87ff05309b78275e6d80b1d567e759e1bc9cfd16cc37f5b4f9d77b59fa