Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5cd341579bd2a7…

MALICIOUS

PDF

71.3 KB Created: 2021-04-17 12:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 872f7493e194e16b7284f34559ed389e SHA-1: 27d3dd89e63ac6c66c346e51ad2a6b1b4bf73483 SHA-256: fe5cd341579bd2a735151117d7a4b3e279497cca6539fd6f7873d0b2f417a77f
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting or suspicious domains, indicating it functions as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to distribute traffic to these external sites, likely for malicious purposes such as phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/strik?utm_term=kenneth+cole+reaction+watch+manual PDF link annotation
    • https://takojozosuliwo.weebly.com/uploads/1/3/0/7/130739597/fumimizewaritopu.pdfIn PDF document text
    • http://lerob.info/subtraction_using_place_value_strategyjszff.pdfIn PDF document text
    • https://tewukowil.weebly.com/uploads/1/3/2/7/132741555/zisegex_fijaseko.pdfIn PDF document text
    • http://jobware.pro/jufogox7w0sj.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/solaviwiwejilewasudoxal.pdfIn PDF document text
    • http://13millions.store/liritujofagey2r4x.pdfIn PDF document text
    • http://s7hmus.org/biblia_romanaj355e.pdfIn PDF document text
    • https://zodixezujiz.weebly.com/uploads/1/3/5/3/135345824/8065981.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/93271418921.pdfIn PDF document text
    • http://aov.one/denefewowepuji0tn80.pdfIn PDF document text
    • http://intekzafast.online/4444002960ommzs.pdfIn PDF document text
    • http://monongzhlh.space/loromunezimatajojuzuder0ou6.pdfIn PDF document text
    • http://tuzevijubozor.mywebcommunity.org/midowasojozo.pdfIn PDF document text
    • https://vuxojamobepu.weebly.com/uploads/1/3/4/3/134333522/pavajibaxuser-vibimujiveti-midilozato-duvatixiragexe.pdfIn PDF document text
    • http://dkblogin-de.com/division_worksheets_for_7th_gradexa33i.pdfIn PDF document text
    • https://xinufagepowe.weebly.com/uploads/1/3/4/4/134437511/dd56d13486e4f.pdfIn PDF document text
    • https://fenotitejov.weebly.com/uploads/1/3/5/3/135316040/tabalo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/73861463-db5e-4d7b-b0fe-0e2c3ff53a63/gajawobobixujuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74fa4c99-2c45-4579-93af-91ce114411fc/sole_f80_treadmill_reviews_2020.pdfIn PDF document text
    • http://penobugixova.atwebpages.com/32192084023.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/34884328159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca65790-9ec5-4f49-9726-2666f6f981d9/bissell_proheat_2x_revolution_pet_pro_carpet_cleaner_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05ae0baf-eff1-494e-bae2-b7c1f696acb4/citizen_eco_drive_world_time_chronograph_easyjet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e254efc2-6b38-4aaf-a991-a2fc57cfe1e9/why_is_my_2014_dodge_durango_overheating.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_off0000da21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA21 4920 bytes
SHA-256: a95d2ac8fe71dbffb9528ee3690aba69d79151d3211bc175ee9e96e4d3dfeb00
font_01_sfnt_off0000eac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC9 11028 bytes
SHA-256: 77913d9edd0a8e84ba97dbc8fc317be2580bea54513e1a32ec9bd7eee5e2e9b6

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