Malicious PDF — malware analysis report

Static analysis result for SHA-256 5940b3554e1b307c…

MALICIOUS

PDF

75.0 KB Created: 2021-05-08 07:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 640d34ab385a2617dc8103d1a1d7458a SHA-1: 8c7a4c2b54e7408c3c674bfd9a2972cb85af8eff SHA-256: 5940b3554e1b307cd3e2ce750fdd0cc685effd3e1f3300957c8654eb40046492
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 0.9997

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://mezovuduw.ru/strik?utm_term=how+to+make+a+jelly+roll+for+quilting PDF link annotation
    • https://nubesojobe.weebly.com/uploads/1/3/1/3/131398221/4849881.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/gojbia2/29915322046.pdfIn PDF document text
    • https://cdn.sqhk.co/ragonujip/c14hclf/arrow_films_warehouse_sale.pdfIn PDF document text
    • https://fidagavatijib.weebly.com/uploads/1/3/1/3/131398583/foxufefagi.pdfIn PDF document text
    • https://latapelubatute.weebly.com/uploads/1/3/5/9/135960370/8328e.pdfIn PDF document text
    • https://teduzagegoxow.weebly.com/uploads/1/3/4/4/134400331/zofomenegaviton-menovod-leboraguwemejof-zijibomogagobav.pdfIn PDF document text
    • http://bamiluzigu.mygamesonline.org/dirt_bikes_for_sale_near_me_under_200.pdfIn PDF document text
    • https://kapojisu.weebly.com/uploads/1/3/2/6/132696117/2915896.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/nicha2j/bike_racing_2019_apk_download.pdfIn PDF document text
    • https://wamabiror.weebly.com/uploads/1/3/1/1/131163705/bugilanozamokitu.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/vapapovatituwakexetumizi.pdfIn PDF document text
    • http://lozuzaragujeb.mypressonline.com/ccna_routing_and_switching_200_125.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/S4xjLLW/35056431159.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/higjgh5/ratamimipigaraton.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/gumini-defitejawupo.pdfIn PDF document text
    • https://bivorafonesakal.weebly.com/uploads/1/3/6/0/136021739/bb824c7be6d.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/hipI1ja/pitbull_dog_food_muscle.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/ggjbKC6/26116816962.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/zerepuzuze/jesafim.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/29930488440.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/govusoxesito.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_off0000e756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 5328 bytes
SHA-256: 86a28690bcccae532c8719482f08a4d7f761b7820adf6181c02e9cd979466cf9
font_01_sfnt_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 10840 bytes
SHA-256: c32f5c0d90431c00c1befa265195793c7b70588e201b605697efc2a05f0c3f20

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