Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3ec04b4032b8f6…

MALICIOUS

PDF

68.8 KB Created: 2021-01-20 20:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 939d261bad98ad3831b708a9036ef6c7 SHA-1: 754de6871cd9633b56f3034a455370b2fb942cbf SHA-256: ef3ec04b4032b8f6d4c4d4f61086248d1c8fd75a88eb9050df9d942e60cdb8d0
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains an external URI pointing to a suspicious domain. The PDF document body, though heavily obfuscated, suggests a lure related to 'Rider waite tarot cards pdf', which is likely a pretext to drive users to the malicious URL. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/123?utm_term=rider+waite+tarot+cards+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464702/normal_5fa5d50e7c87f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367923/normal_5fdeadbb59525.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371514/normal_5fa859ca89546.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444386/normal_60011ed4dfd5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485810/normal_60064b268fd6a.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/tEjizfK/learn_html_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/XURiaG9/95272287300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459478/normal_5fa3913788997.pdfIn PDF document text
    • https://sexaxekeka.weebly.com/uploads/1/3/5/3/135313825/lezesino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474988/normal_5fdbd5388cdc8.pdfIn PDF document text
    • https://bofujobepoj.weebly.com/uploads/1/3/1/1/131164048/656963.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/math_worksheets_multiplying_and_dividing_decimals.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/sowavaguwonusuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/bamadixakamup.pdfIn PDF document text
    • http://xugidujesu.epizy.com/26033382609.pdfIn PDF document text
    • http://baxodivol.rf.gd/34887065803.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAB 5216 bytes
SHA-256: 9f81bdce8940b49dd5c80d6c4732916f01a052253c9ab777457ba221f3e54f5c
font_01_sfnt_off0000e094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE094 11280 bytes
SHA-256: 91430d1d906d90cc8cb99cd82836a83af81dcc8fd53555bef26b069fbd9a3d42

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