Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6bf5dc19bf2912…

MALICIOUS

PDF

76.6 KB Created: 2021-03-19 12:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2410490b03935e27ee4b9b84f26f39db SHA-1: 265ded9ada93b6362242f8b7b85d4b86bd45fa0b SHA-256: fb6bf5dc19bf291219724df20d35065ac3d97313c727f2521c382c3f0beeeb80
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/strik?utm_term=sig+sauer+p320+compact+or+full+size PDF link annotation
    • https://cdn.sqhk.co/tezofugowura/ijxghib/leap_day_game_february_29.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/21251011274.pdfIn PDF document text
    • http://setafugeridol.scienceontheweb.net/db2_sql_queries_tutorial.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/61024228014.pdfIn PDF document text
    • http://zijofazasogija.getenjoyment.net/jedaluz.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/77494561317.pdfIn PDF document text
    • https://kefuvavubuxega.weebly.com/uploads/1/3/1/1/131164002/0b681ec230e.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/present_simple_and_present_continuous_exercises_upper_intermediate.pdfIn PDF document text
    • http://fevinoreniwelik.sportsontheweb.net/funivo.pdfIn PDF document text
    • https://cdn.sqhk.co/bonosexov/ZjhkhcT/real_gangster_crime_mod_apk_gamemoddownload._com.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/1539214.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/lenenuxakerezuxuzi.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/pugomonapoxuxe/38974711441.pdfIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_0150a53d196048a6ab2d10ce15e45432.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/21951479379.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/kabesumujapojeb.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_09784ebcf84c47d4b5df2c7c9217feb6.pdf?index=trueIn 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_off0000ea4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4A 5924 bytes
SHA-256: a630a65aec1d5212215ecff55035ef1d16f5a2976c5e74f7f005665c40acf477
font_01_sfnt_off0000fe6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6A 11248 bytes
SHA-256: a02f33d98d2c0623cb1917831c5c3403cf1a8e18283ae31eddb7498bfa55ed60

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