Malicious PDF — malware analysis report

Static analysis result for SHA-256 9174a4d638f723e2…

MALICIOUS

PDF

73.4 KB Created: 2021-02-28 06:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 61120457ac463486683571068703d46e SHA-1: 601deafca9a3a17654d696625128499c2438c2ca SHA-256: 9174a4d638f723e2ac504bd0e6508d968c3962978dcf6e340d53695e10b397f3
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically pointing to a movie-related keyword on a suspicious domain. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/award?keyword=doctor+zhivago+full+movie+online PDF link annotation
    • https://lujumibuxoze.weebly.com/uploads/1/3/5/3/135350241/9630132.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/In7chcE/promotional_discount_codes_for_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/nufuwijili/jg0heUk/add_text_on_photo_free_download.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/how_to_use_plantronics_voyager_legend_bluetooth_headset.pdfIn PDF document text
    • http://befemuvejizu.22web.org/far_cry_4_strategy_guide.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/is_red_bull_better_for_you_than_monster.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/computer_box_repair_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/nafumozuwe/enieNjh/bojeseke.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/cheJgj6/bucketlist_bombshells_forbes.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/fajonubinomeder/10_column_worksheet_adjusted_trial_balance.pdfIn PDF document text
    • http://faxiwig.epizy.com/sixeliregazosepixu.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/sipitilijulibuzazexaf.pdfIn PDF document text
    • http://nexaware.epizy.com/canterbury_city_council_housing_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/consonant_l_blends_worksheets.pdfIn PDF document text
    • http://xevupan.rf.gd/ferotuwatuluvuwate.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/davufetof.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_off0000e5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FD 5228 bytes
SHA-256: ad279f2ddf0b9c52229302c225281eb7c9956f5c320a4b3eb501249822d3be0a
font_01_sfnt_off0000f7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BA 9648 bytes
SHA-256: f19e56d81844e0b05b7caff8ecfbaee407f226d1bfc166ba6ef7fc495a81b179

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