Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b9d554e5b3e57d…

MALICIOUS

PDF

76.7 KB Created: 2020-11-14 11:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7847df526da05d4aacaf6a79142c8f6b SHA-1: df06035463945e4490a3252179d3753320bd39db SHA-256: 18b9d554e5b3e57df7ac68b346c46a39e5628dfd6cb03f1eb996d7d2f4d46f43
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 URI pointing to 'traffset.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to song downloads, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=teja+songs+download+naa+songs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421335/normal_5faeda49497fb.pdfIn PDF document text
    • https://rawixokuboja.weebly.com/uploads/1/3/4/0/134097397/4695126.pdfIn PDF document text
    • https://namuxewanazojo.weebly.com/uploads/1/3/4/2/134266474/kazegon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450158/normal_5fa1301073fa8.pdfIn PDF document text
    • https://sarixibaparuve.weebly.com/uploads/1/3/4/3/134382026/1977416.pdfIn PDF document text
    • https://rofowijajexer.weebly.com/uploads/1/3/4/4/134476616/7645991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502493/normal_5fad8081746ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lomogas/rachael_ray_cucina_2_piece_knife_set.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/vibojitetufusazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef8c4d27-936e-41f2-8481-602f013b7541/51929338890.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/the_keep_on_the_borderlands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/787cc88d-c62e-446b-938b-f12a5cd1e6a0/25226861891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a77ac9b-d4ce-41bb-b41a-f84e95179026/jurassic_world_evolution_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/verbal_operants.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC496 4672 bytes
SHA-256: f043215974faa94c063eab632814cebc77a37fe59dc93d795a1efbb50c319c91
font_01_sfnt_off0000d491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD491 11056 bytes
SHA-256: 3e272a6c25d2c19146b08581915a0f014ee2366837a0a1308150157bd1bf4c1b
font_02_sfnt_off0000f3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EC 10332 bytes
SHA-256: 98dba2b067f8e9a728b9649e6bf254dfa079860d823e6bab11a8ae36d2d4ddc8
font_03_sfnt_off0001175e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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