Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f68e305cb1a333c…

MALICIOUS

PDF

64.2 KB Created: 2020-11-25 11:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c6bd80e5f37f48df990eb2d9db3d122 SHA-1: 257f0b486ddc0e8451426c81e5cb242ec5aaa224 SHA-256: 9f68e305cb1a333c1382a174bf76eda92c835b1ae7f32c956403f7de6819a83e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to 'traffine.ru'. Heuristics indicate the presence of external URIs and a high ML score, along with a ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, appears to contain text related to a poem, suggesting a lure to disguise the malicious intent of directing the user to the external URL.

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/123?utm_term=suicide%2527s+note+poem+langston
    • https://cdn-cms.f-static.net/uploads/4417046/normal_5fbc3797129d0.pdf
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f97e8601d02f.pdf
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5f8cc7f591291.pdf
    • https://cdn-cms.f-static.net/uploads/4416302/normal_5faeb6cfe756f.pdf
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f9564328689b.pdf
    • https://cdn-cms.f-static.net/uploads/4412164/normal_5fa75f91e5f9c.pdf
    • https://cdn-cms.f-static.net/uploads/4456663/normal_5fa04ed42cf3c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/11f61f70-6300-4b4e-b9ba-8c9298fc8e67/punyalan_agarbathis_2.pdf
    • https://uploads.strikinglycdn.com/files/50438283-702b-4b56-a7e7-a17a45e3464d/pidalazebaram.pdf
    • https://uploads.strikinglycdn.com/files/973b716f-3095-46aa-bc15-645bfc7f13e6/fuxagitumogadeniliguper.pdf
    • https://uploads.strikinglycdn.com/files/f34a6200-e2b4-46e5-94f4-209262b7e1b2/muxaduxesemof.pdf
    • https://uploads.strikinglycdn.com/files/f3d440e8-9913-4b5f-a71a-0aed831fc326/sedudovi.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_off0000c072.bin
c10184765fa211a2321c116ad90829cdbf3ff6cc603cffb0e42cd45fc88997b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC072 5432 bytes
font_01_sfnt_off0000d2e3.bin
189cf9a78f657ae15702ffc9c5135725bdfac10ec019bc1998a38ffec245c209		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E3 9856 bytes

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