Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0266ff554c1899a…

MALICIOUS

PDF

77.3 KB Created: 2021-05-03 19:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8ac7dd6231e835e4259adfcb8b5ff803 SHA-1: 09a1bbf08fa64e5accb4b46e92634d7983545447 SHA-256: b0266ff554c1899a5b0cc16c777494a8c5057fef3b6e96bc26a005ab15ed3046
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing or malware distribution. The document body, though heavily obfuscated, contains references to car reviews, likely serving as a lure to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=2013+dodge+avenger+se+reviews PDF link annotation
    • https://kesegupopu.weebly.com/uploads/1/3/4/1/134131766/5939433.pdfIn PDF document text
    • https://rizofuruw.weebly.com/uploads/1/3/0/8/130873790/9aa001aa3d93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_600d5c7e33c64.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/7Ajbfhf/hex_compare_tool_online.pdfIn PDF document text
    • https://vojawozusuv.weebly.com/uploads/1/3/1/1/131164351/5b9537437.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459467/normal_5ff9d65a93f45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492240/normal_605f580230473.pdfIn PDF document text
    • http://nefuwumimo.iblogger.org/fojibizaximazob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450415/normal_60341ba65ebd7.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/cFialhe/tiny_kingdom_builder_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/xfjfo23/draw_a_stickman_epic_free_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393483/normal_5fcd46a2a2b39.pdfIn PDF document text
    • http://xonerorobigeke.iblogger.org/dawisiwaguk.pdfIn PDF document text
    • https://xipowabiwakazo.weebly.com/uploads/1/3/4/6/134614187/6478957.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kamuwizedelas.rf.gd/12009270750.pdfIn PDF document text
    • http://puvumepuf.epizy.com/bol_radha_bol_song_mp4.pdfIn PDF document text
    • http://ritanuwo.epizy.com/rental_lease_agreement_form.pdfIn PDF document text
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_2e98386a16da496a90ddab9a985fbd2a.pdf?index=trueIn PDF document text
    • http://bidexegope.epizy.com/movies_tamil_padam_ing.pdfIn PDF document text
    • http://powipuwefitori.rf.gd/19652613925.pdfIn PDF document text
    • http://kusegewamuzazod.epizy.com/number_1_businessman_full_movie_hd.pdfIn PDF document text
    • https://78f121e6-5824-477f-9480-4bf23eba804c.filesusr.com/ugd/9564ad_bee4d12c2687437b8d5a495e20336fab.pdf?index=trueIn PDF document text
    • http://pawutewitozi.epizy.com/nibutegabovow.pdfIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_71ff655d712b455d9e114efe12b2ba84.pdf?index=trueIn 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_off0000f02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02D 5508 bytes
SHA-256: 370dde06f7cbf41863d500f8ab96c0bf7c6e5417913d17850c61c8038101a0ac
font_01_sfnt_off0001030c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030C 10676 bytes
SHA-256: 6635241b97e3ae89810bd8b5407fa53933ea76986668a579cf261302525a0c82

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