Malicious PDF — malware analysis report

Static analysis result for SHA-256 4125cb14a1b53370…

MALICIOUS

PDF

77.3 KB Created: 2021-04-29 19:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5f5561b0c1819401ce0525f4b097e8e5 SHA-1: 5ab97b846aaed9b5bae7a41559523ebf17089769 SHA-256: 4125cb14a1b533704328b6497712115275bc6ae1aa736f19f0cb914a0350c802
126 Risk Score

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 0.9994

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://maypoin.ru/strik?utm_term=can+a+pathfinder+pull+a+travel+trailer PDF link annotation
    • http://valigulepi.scienceontheweb.net/british_english_grammar_book_free_download.pdfIn PDF document text
    • http://alifan.store/download_skill_with_people.pdf_bahasa_indonesiam62oy.pdfIn PDF document text
    • http://secureappeal.com/download_game_the_island_castaway_3_freeqy7jy.pdfIn PDF document text
    • http://optamorem.com/42399951907c4dr2.pdfIn PDF document text
    • http://productwood.ru/fagiralenokekisoprzz03.pdfIn PDF document text
    • https://jetisinodab.weebly.com/uploads/1/3/5/3/135335938/dujiri.pdfIn PDF document text
    • http://sparzha.club/92477882891mgerf.pdfIn PDF document text
    • http://scandisvet.ru/john_fraser_secondary_school_teachersocnm2.pdfIn PDF document text
    • http://cmbespaceclient.xyz/insulation_polyurethane_foam_sheethkpld.pdfIn PDF document text
    • https://tufanemoxidubux.weebly.com/uploads/1/3/4/3/134315727/1835744.pdfIn PDF document text
    • http://kegumexiwekot.22web.org/fufoniwujoxifo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_2c28aa6ee87a40bb8547e4da065fe872.pdf?index=trueIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_5aa5252e28e2495dbcb17125e4f288cc.pdf?index=trueIn PDF document text
    • http://dovovefuwaxav.epizy.com/47693299022.pdfIn PDF document text
    • http://zelejiv.epizy.com/1079293776.pdfIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_24570684d2e141a4a64bad6f88d21d59.pdf?index=trueIn PDF document text
    • http://finosumu.rf.gd/whirlpool_dishwasher_wdf520padm_manual.pdfIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_5d51912531784485bbf8b2df0f843859.pdf?index=trueIn PDF document text
    • http://vobozezojip.onlinewebshop.net/98368688490.pdfIn PDF document text
    • http://wenulusevikofa.myartsonline.com/botaxozijerina.pdfIn PDF document text
    • http://vumafovixono.rf.gd/fancy_nancy_episodes_free.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA3 4916 bytes
SHA-256: f5692c285507484298a7da11b416a9908bee1f992d5cad5c017883b6b5755462
font_01_sfnt_off0001005d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005D 11460 bytes
SHA-256: e0e5ea3e0a09822a3036d674adcdf52747e36f88779ddb1dff1b798949c0ff38

Open this report in the interactive analyzer, or submit your own file for analysis.