Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c27615fa8f76c02…

MALICIOUS

PDF

79.0 KB Created: 2021-03-08 14:23:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 4a91d46e1d1c64052641e929ba973b79 SHA-1: e1087b7a8029e164cadda837101c4c86e7df9850 SHA-256: 1c27615fa8f76c023b8e75738a1c51b38ea64fd35d9b6130408e5bcab9e4c0fa
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to 'machine learning stock market pdf'. The presence of embedded URLs and the ML classifier's high confidence score indicate a phishing 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://kuzutuzo.ru/award?keyword=machine+learning+stock+market+pdf PDF link annotation
    • https://tupisefam.weebly.com/uploads/1/3/1/3/131383837/sugefi-jojebitutusa-lapofomagiw-pibevesifi.pdfIn PDF document text
    • https://biteledazuxol.weebly.com/uploads/1/3/4/3/134315761/vogudi.pdfIn PDF document text
    • http://rasezinetoge.iblogger.org/biravipizasilo.pdfIn PDF document text
    • https://xaporavuxeboj.weebly.com/uploads/1/3/2/6/132695407/jagewoxafapapitutase.pdfIn PDF document text
    • https://dexazime.weebly.com/uploads/1/3/1/4/131437554/72c83916c084.pdfIn PDF document text
    • https://sumijiluwovoj.weebly.com/uploads/1/3/4/2/134266387/9a8ae2dd92df.pdfIn PDF document text
    • https://jasidixivogejo.weebly.com/uploads/1/3/4/7/134749747/nudaze.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/vidadaviwal/38936393176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c8a648-f7a6-48df-8779-a11bbd767758/99485492167.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/22323481881.pdfIn PDF document text
    • http://nadovudeduxawos.rf.gd/kemeni.pdfIn PDF document text
    • http://zobotipuzadevi.epizy.com/authority_letter_format_for_us_visa_collection.pdfIn PDF document text
    • http://residarifuwus.rf.gd/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8d0d086-05f8-4aea-9d3a-8c2ca79a0725/dungeon_master_screen_reincarnated.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/87861106872.pdfIn PDF document text
    • http://tagozenumuzem.rf.gd/aquaculture_best_management_practices_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39718c8e-d6ed-4bc6-a60d-b4e28d33414f/povajejiwewaxugopezipa.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/gurarojezotisuxit.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_off0000f258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF258 5640 bytes
SHA-256: 6b3563153e89e48895570368d494f2c1e14651164d3d2614192f4abfbc0c9430
font_01_sfnt_off00010565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10565 12396 bytes
SHA-256: b77c1c5ee994546369fa7b9bd623e627289f393bf9e8f3f937061e4c52341a1c

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