Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da5b8e0343013fe…

MALICIOUS

PDF

88.7 KB Created: 2021-03-23 16:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 417c7e68a3543e31f72a2d75610a8830 SHA-1: b0c54862b1bddb0b5ea464804306372f02ff1f5c SHA-256: 0da5b8e0343013fe5d8c696e12a32ee1bdc87ab4f3f297dbf4343e718a685e6b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://fokemale.ru/wix?keyword=digimon+next+order+recruitment+guide PDF link annotation
    • http://sejerodetupumil.medianewsonline.com/digawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446270/normal_5fd6836a8c148.pdfIn PDF document text
    • http://gigezesuzobe.getenjoyment.net/tivosiwulufu.pdfIn PDF document text
    • http://ropejolun.iblogger.org/bugixexajibuj.pdfIn PDF document text
    • http://liwitesuzemumex.sportsontheweb.net/cost_of_living_comparison_worldwide.pdfIn PDF document text
    • http://kuxemanes.medianewsonline.com/abide_with_me_music.pdfIn PDF document text
    • https://cdn.sqhk.co/jobasalem/gg4iaUP/ponidonemelugulokad.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/wiwesizita.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/gjkhhhg/setilavakobijitawox.pdfIn PDF document text
    • http://wajazenizur.mywebcommunity.org/ruvewapezixiliz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451375/normal_6026fa7c34462.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://merekum.rf.gd/purukitasunimizarurebenip.pdfIn PDF document text
    • http://fivamoxopel.epizy.com/8988233224.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/the_invisible_man_by_ralph_ellison_themes.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/yokogawa_electric_corporation_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/xadavakukawizobiru.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/masterbuilt_adventure_series_mps_330g_thermotemp_propane_smoker_reviews.pdfIn PDF document text
    • http://totuxivez.onlinewebshop.net/living_with_the_himalayan_masters.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/how_to_use_a_single_cup_keurig_coffee_maker.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_off00011f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9B 4908 bytes
SHA-256: 9b7b04e7b4842ff9f949c265920e8fa2c863aae3f6b68d4d58233fab3af87c81
font_01_sfnt_off00013043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13043 10952 bytes
SHA-256: f83c23cd0a564571dbb8087ff262f2002ec705f407462876f00facdaa22e7ce8

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