Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c50cc9bf5bf0b22…

MALICIOUS

PDF

82.4 KB Created: 2021-07-23 02:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ddbd734efc6117e1c58de54ae4a8603b SHA-1: 6d45a13c6821d983b6a0524993ea243ab9477042 SHA-256: 8c50cc9bf5bf0b221285c8c5be9cb22ce9f7655854d72e0fd6305a4e4ab69418
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to host malicious content or redirect users to a phishing site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://pistant.ru/square?utm_term=professional+storyboarding+rules+of+thumb+pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f20c111d82da67a39ba89b/1626475537836/stencil_face_drawing.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f9dd3c7efbeb31f21f8195/1626987836592/57633877986.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1589cf32be22f0078b653/1626429596795/94282033785.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f76f79ee1bd15b6ecf2dc8/1626828666015/grey_and_black_corn_snake.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e85c836a4ec93e06c52cc6/1625840771188/positive_self_reflection.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f6bf95a4e3c81036b70f3a/1626783637227/pure_tone_audiometry_test_cost.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2a01551c2e86098482f5b/1626513430092/lodojesirenaxo.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee3303537273346e2ed56b/1626223363739/metajive.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f46e37668793736d3cc5fc/1626631735975/they_cage_the_animals_at_night.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7c3d457d2352c927b3254/1625801684950/17977935542.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee030a2799685454fd4135/1626211082994/kotukilimemoparujaz.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2fae5cba7b71501e23389/1626536677407/wafarewigenavo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec9acb11a746407a437208/1626118859917/the_tkt_course_book.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60fa00e49e2b4e2d049abc52/1626996964655/canonical_order_of_the_bible.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e91d33fc46b1505827f746/1625890099263/largest_cell_in_human_body.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0862c3cb39763f158cf5b/1626375724986/worksheet_7.1_simple_supply_and_demand.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f9df53622f3312629051a3/1626988371532/use_of_determiners_in_english.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f6a03ce937b46fbd1ed3d2/1626775613549/dajigivax.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f6d2361e8f7d23f9effeff/1626788406360/jajevukamudanak.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f218a05f380662d77cfb61/1626478752435/best_airlines_to_fly_with_esa.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2f6790b174908920922b3/1626535545985/janabejogurefimogumadoze.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e15a.bin
c836ad9438acca88af82c9bb46e519e30ca4e9fca00693b86fe9c5a360909721		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE15A 11300 bytes
font_01_sfnt_off0000fb4d.bin
99531ca8615f7595e8a0d9551e3167ef34810d91f2888d0a9c88e858c7b41937		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4D 15848 bytes
font_02_sfnt_off00012455.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12455 16792 bytes

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