Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fe84bb6aed4b4a…

MALICIOUS

PDF

60.9 KB Created: 2020-11-13 07:15:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a4fb54a41ac50fbae9221df86758af5 SHA-1: 1823403c36dafa2ca8665563cfe20a76de9c8c4b SHA-256: 07fe84bb6aed4b4a46f73be13a7467cd47b616ed5c768634468092558fec3eac
96 Risk Score

Malware Insights

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

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 part of a phishing or malware distribution scheme. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a malicious site.

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://trafficel.ru/123?utm_term=8th+grade+math+module+2
    • https://cdn-cms.f-static.net/uploads/4382772/normal_5f8c3e1c35706.pdf
    • https://cdn-cms.f-static.net/uploads/4422622/normal_5f9f753002bec.pdf
    • https://cdn-cms.f-static.net/uploads/4382430/normal_5f9ba00e8b09d.pdf
    • https://cdn-cms.f-static.net/uploads/4419198/normal_5f95db337f01f.pdf
    • https://cdn-cms.f-static.net/uploads/4370270/normal_5f91c1ccecb8c.pdf
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f8b3ac5bc8cd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/suximawo/luzowefesunap.pdf
    • https://s3.amazonaws.com/gurowozenupifi/absent_letter_for_college_students.pdf
    • https://s3.amazonaws.com/xatojem/eddie_bauer_pack_and_play_recall.pdf
    • https://s3.amazonaws.com/tosevud/99102570737.pdf
    • https://s3.amazonaws.com/sirasu/smule_apk_mod.pdf
    • https://s3.amazonaws.com/damerirazib/61666118271.pdf
    • https://s3.amazonaws.com/robumuduluwise/student_links_page.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa54.bin
51bc7fc9bafcdc465553eea517fc4eeb71f03e41480cc9e71158d1751556d6da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA54 5020 bytes
font_01_sfnt_off0000bb60.bin
e57f8132fce84fd9fc1c02db8545845d9e4ce1d6c5ee742946951c93d4d95615		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB60 8712 bytes
font_02_sfnt_off0000d924.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD924 4324 bytes

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