Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9b07f92da661c35…

MALICIOUS

PDF

68.7 KB Created: 2020-12-11 14:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7dd72d8abd904b7c34d6d86d85a33d1 SHA-1: da3ce55f77df03c8838feab077f505c6d8ea7580 SHA-256: f9b07f92da661c359937c2b4d009ec494348652e597192f5329ba144b54ec0a1
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 that, when analyzed, points to a domain associated with phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to educational materials to entice users to click the malicious link.

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://traffine.ru/aws?utm_term=reading+skills+worksheets+for+grade+1
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f9042f09bb9b.pdf
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/df96d68fee3fa7e.pdf
    • https://vufupobuzalezu.weebly.com/uploads/1/3/4/8/134853030/zuvidogumijam.pdf
    • https://cdn-cms.f-static.net/uploads/4369313/normal_5fad73a2d5358.pdf
    • https://cdn-cms.f-static.net/uploads/4421209/normal_5f9d165501077.pdf
    • https://static.s123-cdn-static.com/uploads/4484355/normal_5fcbc5f0102ed.pdf
    • https://cdn-cms.f-static.net/uploads/4489404/normal_5fd2fafda97cb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc002e7e5c7695ca996b6a8/t/5fc48e83e18c5c478e8d2b4c/1606717059480/golden_gate_transit_route_101_stops.pdf
    • https://static1.squarespace.com/static/5fc4cf8bf9866f3fd2ed119a/t/5fc74aa3e2dcb1274dec8520/1606896292371/criminal_case_number_search_california.pdf
    • https://uploads.strikinglycdn.com/files/ee0ad414-61e9-4d24-bd80-3a6a31a4eb4f/1211869336.pdf
    • https://static1.squarespace.com/static/5fc0cce660f2895dc1e7592c/t/5fc12fd75147b148045e72f6/1606496217522/midwest_city_high_school_yearbooks.pdf
    • https://static1.squarespace.com/static/5fc37324df132613bbcddee0/t/5fc68715173fb5383b87079b/1606846230461/easy_airtime_top_up.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_off0000cfc7.bin
65bc84fd0624878813e73a51dadfcb0e235c4c13ee7a45fb905724ddc5e13b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC7 5384 bytes
font_01_sfnt_off0000e236.bin
aa0bc5fcdb0427f9038b702772d59b10bd4ca19f2f6a77dd85dea406fea13f67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE236 10608 bytes

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