Malicious PDF — malware analysis report

Static analysis result for SHA-256 a31c4ee82ad5206a…

MALICIOUS

PDF

69.4 KB Created: 2020-12-29 20:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1902428c2375fa92488a64c5a5eb3585 SHA-1: 5b6fd2323326ce4c5132d67c973a17a943ffa915 SHA-256: a31c4ee82ad5206ab5db2e1e076d2e8f42c8ada86ac3205ef4e37879137bf83b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a domain associated with game-related lures, suggesting a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic indicate the document's primary function is to redirect the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffine.ru/123?utm_term=mario+bros+in+sonic+world+unblocked
    • https://static.s123-cdn-static.com/uploads/4481173/normal_5fc79a389e264.pdf
    • https://cdn.sqhk.co/xinulezebi/6iWgfLx/daily_deals_muskegon.pdf
    • https://milelujip.weebly.com/uploads/1/3/4/8/134861654/noxuma.pdf
    • https://cdn.sqhk.co/netesatova/xhfjehd/house_painters_near_me.pdf
    • https://losanuritajog.weebly.com/uploads/1/3/4/7/134730792/8c3bed9798db7b8.pdf
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/zegagoragek_nepumudusoku_woguxasar.pdf
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5f8f7fbc9fe28.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f13dc32e-38ec-435c-bded-ea204a9cf71f/do_snakes_sleep_with_their_eyes_closed.pdf
    • https://uploads.strikinglycdn.com/files/ff6305a2-7b20-441f-a03b-78f037d6e628/neurology_board_review_question_bank.pdf
    • https://uploads.strikinglycdn.com/files/bb48ef00-6f91-4e37-8f59-6697025bbff9/bike_rider_jacket.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_off0000d3e1.bin
323f44ce8c9b623ef81063d02c62e848b323273baa6cd575f1786c3da5bdc954		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E1 5232 bytes
font_01_sfnt_off0000e5d6.bin
869f6033842942b61c6fce5bf4bf389b7ba2a743283c1ed8db30daf4fd286838		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D6 10160 bytes

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