Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f097fb78d39ba22…

MALICIOUS

PDF

78.0 KB Created: 2021-03-14 16:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 83f4e360d48b0aaf7fa92396ad83085a SHA-1: 4a0799d71003d2fab9ca343d768e764e76dfbde4 SHA-256: 1f097fb78d39ba22c850b6b6db199b02c3ed69e4c9fb7dadf1169dbde22d5f42
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs, with one prominent external URI pointing to a suspicious domain, likely serving as a lure for phishing or malware distribution. The PDF structure and embedded content suggest it's designed to exploit user trust, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/strik?utm_term=what+is+the+importance+of+literature+in+our+daily+life PDF link annotation
    • https://cdn.sqhk.co/savunowudob/gjcx7hG/diaphragmatic_breathing_vs_chest_breathing.pdfIn PDF document text
    • http://vugezaselefobop.iblogger.org/gedotorubuxafakodekuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460045/normal_5fd1c0c353e80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389581/normal_6024a5750b575.pdfIn PDF document text
    • http://dmgameplan.com/95864479333uhk6v.pdfIn PDF document text
    • http://nunajurum.iblogger.org/navy_ball_dress_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465685/normal_6001befeb3d0f.pdfIn PDF document text
    • http://finofoze.22web.org/dimoliv.pdfIn PDF document text
    • https://cdn.sqhk.co/sejukuxa/ihfjfhb/rodazozogilimobudotosem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405652/normal_5fef528b620df.pdfIn PDF document text
    • https://cdn.sqhk.co/lipidupi/bhchafx/ups_gonzales_oxnard.pdfIn PDF document text
    • http://a-trvl.ru/rowuxenevisuron0c08.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/hgjmu7R/bawubedonabol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445125/normal_5fcfaf7a2428b.pdfIn PDF document text
    • http://womenita.fun/624859104304sxir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://boreduse.rf.gd/burnout_paradise_remastered_trophy_guide_and_roadmap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe13f16a-57f7-4f40-8416-6c9834c6c7ab/32775379054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64bdcc2-cf97-421b-8902-c435da4fe26d/ruzajobididojuvuruw.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/nibiganoxisogizukalemudov.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/58479485162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0759abc-785b-4aad-ac2c-e4241aaa38c2/interior_design_salary_uk_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 5392 bytes
SHA-256: f77767f80ecb5f011f07ebccc6b1aa3dd9328c45910f8a4764945e30d1ab90c3
font_01_sfnt_off0000f89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89F 10320 bytes
SHA-256: 006a0c9db99bca3ec317a7607c2a9e79fbaed502608667ece72e12e417c1a4ae
font_02_sfnt_off00011be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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