Malicious PDF — malware analysis report

Static analysis result for SHA-256 8525dd81a8881a24…

MALICIOUS

PDF

64.2 KB Created: 2020-12-21 10:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef6b1ee54d18c7af78ee4dfe6de2866f SHA-1: 1b3444a34d354b24f07a1376ccfc16c7e06f6439 SHA-256: 8525dd81a8881a24a1a4f91f2bcd0d92b9138e538567f57d8ac0e30d11082763
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'traffset.ru', which is likely used to redirect users to a phishing site or download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to 'origami dove instructions', a common tactic for social engineering.

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://traffset.ru/123?utm_term=simple+origami+dove+instructions
    • https://cdn-cms.f-static.net/uploads/4413848/normal_5fba6e4311b05.pdf
    • https://moleresudiba.weebly.com/uploads/1/3/4/4/134447347/3491513.pdf
    • https://static.s123-cdn-static.com/uploads/4472488/normal_5fdddaaa1210c.pdf
    • https://migaxodilex.weebly.com/uploads/1/3/4/8/134852634/8d4457e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc0c3cd92c50b1a1e76da16/t/5fc38a9fe18c5c478e69003a/1606650528191/nexeset.pdf
    • https://uploads.strikinglycdn.com/files/6aa4e50c-04ae-49fd-b241-d0479749de0d/gixifulipeluzo.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48c8bc819f1cf4ce9ef9/1606371530792/77801779176.pdf
    • https://s3.amazonaws.com/vavebufevodutob/behringer_truth_b1031a_manual.pdf
    • https://s3.amazonaws.com/golepe/wozabijat.pdf
    • https://s3.amazonaws.com/jaburirarov/pathfinder_attack_bonus_calculator.pdf
    • https://s3.amazonaws.com/zaxuledo/28749615476.pdf
    • https://uploads.strikinglycdn.com/files/18cc18a7-fa4a-48ad-ae1d-fdc4ca6a0907/cash_drawer_count_sheet.pdf
    • https://s3.amazonaws.com/zalomi/bemixabasosukud.pdf
    • https://uploads.strikinglycdn.com/files/d0629054-1737-4e30-aa77-433566614c31/38255388245.pdf
    • https://s3.amazonaws.com/rawesaragegugar/one_in_a_million_neyo_mp3_download.pdf
    • https://uploads.strikinglycdn.com/files/9f3f2b7e-99fe-44b6-b4ef-b1534c275534/64189499199.pdf
    • https://uploads.strikinglycdn.com/files/87d9f3df-bfd3-42f8-a707-7196f3b2e0ac/kufusaxepenujinaxidize.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_off0000be65.bin
0bfe617e9a013bd78b82f191c3d2e77b37c3fd8c142f36fb19e9678e170a179a
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE65 5556 bytes
font_01_sfnt_off0000d140.bin
34ac271e11b3b0699daa1d277b9f64e7afaec63cc8b0c5e62a528369204a9a86
pdf-font-stream PDF embedded font (sfnt) at offset 0xD140 10144 bytes