Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8db98a73a1a7cf7…

MALICIOUS

PDF

76.8 KB Created: 2021-02-28 22:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 636285b5133f36b85f6d723bc37042e1 SHA-1: 36189f4a415c5f7d218dc4f4ce93f6cd6bd8d97b SHA-256: c8db98a73a1a7cf7af0dfad4ccc1f820feb2474d0d4a57f32e52a4c4a3d34d8b
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or scam attempt. It contains numerous external URIs and link farm heuristics, suggesting it directs users to potentially harmful websites. The presence of embedded URLs and the overall structure point towards an attempt to deceive users into visiting these sites, likely for credential harvesting or malware distribution.

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://midufefew.ru/strik?utm_term=kinetico+water+softener+prices PDF link annotation
    • http://wejowadizabudex.mypressonline.com/how_to_remove_cartridge_from_bathtub_faucet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415300/normal_6037c0ec1a7b0.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/stihl_bg_86_spark_arrestor_screen.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/learn_english_speaking_for_beginners_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502245/normal_601e403b28384.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378831/normal_6002840c5ae3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415061/normal_603427f26dc8d.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/mofoxotijirunek_wikur_zolokotuvut_sugulix.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/saguwenatajug.pdfIn PDF document text
    • https://xujuwoxevosu.weebly.com/uploads/1/3/4/8/134896670/fometikubulajelatu.pdfIn PDF document text
    • https://tagelararejo.weebly.com/uploads/1/3/4/8/134846357/lonikurona.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/what_to_include_in_a_film_pitch.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/jcBjegc/99053926778.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473632/normal_60063c4c6ca03.pdfIn PDF document text
    • https://cdn.sqhk.co/miwataxanis/Hsrijif/satoxabewikonafanerafi.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/77327983568.pdfIn PDF document text
    • https://cdn.sqhk.co/tedogegez/ogeieCD/win_liar_s_dice_red_dead_redemption.pdfIn PDF document text
    • https://kelezisexuva.weebly.com/uploads/1/3/0/7/130739204/4128742.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/24_month_milestones_ontario.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/98388278746.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 5036 bytes
SHA-256: 3f8c10fa9eeedeb82085d0a0c8c0edc1b89b6f6064393945ed30801fac4774a2
font_01_sfnt_off00010267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10267 10340 bytes
SHA-256: 5e8831ceffdbc885e992e997e081051cc9a15734f838ddb68ddc50c5ca9d6bee

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