Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7ec8a9dcf96d6e…

MALICIOUS

PDF

71.7 KB Created: 2021-01-12 10:43:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8c77ff8ac15bd25db3cc2c13717bfa07 SHA-1: 90e9a65d7246a51fd07ed90c4356edc667525465 SHA-256: db7ec8a9dcf96d6e7db5dbe0b79c0b9ca81deba2c8345a8229c58edc47ad9700
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, trafftec.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Bharatiya vidya bhavan astrology pdf'. No scripts were extracted, but the presence of external URLs and the malware detection strongly indicate a phishing or credential harvesting 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://trafftec.ru/aws?utm_term=bharatiya+vidya+bhavan+astrology+pdf PDF link annotation
    • https://cdn.sqhk.co/betewulo/eujbCgg/classic_train_simulator_download_demo.pdfIn PDF document text
    • https://cdn.sqhk.co/kivuwutu/idnQgRM/salirob.pdfIn PDF document text
    • https://cdn.sqhk.co/mepofazobi/YmXQfnx/vipevamopagepejomukuk.pdfIn PDF document text
    • https://site-1174310.mozfiles.com/files/1174310/pink_piano_lakeland_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/xazakamugi/CL0Pjcm/20542203331.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/davolazupivowi/google_data_studio_conditional_formatting.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/7762477170.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/isaimini_tamil_movies_2019_kanchana_3.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/binomische_formeln_bungen_mit_lsungen.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/91287167310.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/58737052813.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/3d_cad_blocks_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/fpv_drone_build_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56E 5656 bytes
SHA-256: 158a94e6f972135a94a1de9ac8230b3d2a7b01175c44c7ee015bf27644db20e0
font_01_sfnt_off0000d8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AE 10028 bytes
SHA-256: 901e8c76171c9bbc52b069c31aac23b82deb80bf971b302ad5d1c36be528fa83
font_02_sfnt_off0000face.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACE 16204 bytes
SHA-256: 514ec34c774379c82780ce3b826aceada3291152a2a4734d997485cf707bbc49

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