Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a659935458e1437…

MALICIOUS

PDF

82.2 KB Created: 2021-03-03 05:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f085fcb9983129442639f0e8f04c848d SHA-1: 6bf974598f1063dc19af79769aab61a1e6aa4a0b SHA-256: 8a659935458e143714ff1b4b6972ab51f9b39463a2f62a0a1c976332f54a1149
134 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with a high concentration on disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of urgency lures in the document body further supports a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=do+peter+and+lara+jean+stay+together PDF link annotation
    • http://avbox.org/dufopez2952a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409799/normal_60347e3808f4e.pdfIn PDF document text
    • http://rasprodavaika.ru/pejokupekazafujawup5fb37.pdfIn PDF document text
    • https://tasimaxexakopox.weebly.com/uploads/1/3/2/6/132681882/98225ace07c.pdfIn PDF document text
    • http://fruit-citrus.space/28811135364syd87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420917/normal_6010ff3d67fe5.pdfIn PDF document text
    • https://lutaxebibutemun.weebly.com/uploads/1/3/1/3/131380730/tadokixudapetu-buxujine-tavisukosides-siwezados.pdfIn PDF document text
    • https://vawosikajoj.weebly.com/uploads/1/3/1/4/131438279/soziwor.pdfIn PDF document text
    • http://com-servers.online/508830015243wh0z.pdfIn PDF document text
    • https://cdn.sqhk.co/repejuvovod/ieWgihd/gameboy_color_link_cable_to_gameboy_advance.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/the_shining_remake_cast.pdfIn PDF document text
    • http://daddytestit.xyz/53872496436usfwt.pdfIn PDF document text
    • http://helpcreditscore.info/how_to_start_the_stihl_ms_170_chainsawk70xi.pdfIn PDF document text
    • http://topfrag.rip/rent_agreement_format_kerala_malayalams7360.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://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_off0000f66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 5136 bytes
SHA-256: 8b207f5b097016da5a010dab37232155567d2a8a4d7ae67ff65bb3c17beb49e6
font_01_sfnt_off000107eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EB 10992 bytes
SHA-256: f1fa35a686db4acfef98efcf4f4069f43ff1d390ce834a40e8cc9504dd20ebf9
font_02_sfnt_off00012d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D68 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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