Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b6c15cac5addb5…

MALICIOUS

PDF

71.9 KB Created: 2021-02-19 03:55:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a7fe5ea06bb8db104a71dcc433c791ac SHA-1: 9fa3ce58c79b0a86aa52774bf52153227b89e981 SHA-256: 80b6c15cac5addb563c296facfb828f59717709a8a42269f9efc3010e88a7bfe
244 Risk Score

Malware Insights

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

This PDF document is classified as malicious and contains a large number of embedded links, many of which point to disposable hosting services. The document body, while appearing to be about crocheting, is likely a lure to disguise the malicious intent of directing users to a link farm. The presence of a malicious redirector URL further supports the phishing and link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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=how+to+crochet+a+baby+hat+for+beginners In PDF document text
    • https://ledajesaler.weebly.com/uploads/1/3/4/0/134041179/demomedizo.pdfIn PDF document text
    • https://noribazab.weebly.com/uploads/1/3/1/8/131871745/duxofoledubatew_xuvopogi.pdfIn PDF document text
    • https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/8569054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_5fdac18f1966b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496153/normal_5fde9db3d97db.pdfIn PDF document text
    • https://netopanuneju.weebly.com/uploads/1/3/4/4/134493403/8468b28e60.pdfIn PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/fc13cc95fb135a.pdfIn PDF document text
    • http://gallery-shop.site/9225887257676xfa.pdfIn PDF document text
    • http://expo-kit.ru/casio_g_shock_mudman_solar_compass_93003thnm.pdfIn PDF document text
    • https://dawijenumekoxel.weebly.com/uploads/1/3/6/0/136087820/4925964.pdfIn PDF document text
    • https://siwuxamafovad.weebly.com/uploads/1/3/4/4/134489720/gimisuxelexo_botofodom_ziluxeverewa_kesop.pdfIn PDF document text
    • https://fewegako.weebly.com/uploads/1/3/1/4/131453302/xagitidivaro-favobonag.pdfIn PDF document text
    • http://dkblogin-de.com/los_cuatro_acuerdosh5kwx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383915/normal_5fef890d0e2bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489734/normal_5fd09f688d96c.pdfIn PDF document text
    • http://mscredit.info/surf_shack_menu_grants_nmmgaua.pdfIn PDF document text
    • https://todumubisopid.weebly.com/uploads/1/3/5/3/135312552/2bf243c1e989f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387582/normal_5ffe985236409.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_off0000dafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFB 5408 bytes
SHA-256: 0d92d4b0a7a7bbef2ba18882642b7198951b6f7d591b081269a5aec99219f45b
font_01_sfnt_off0000ed75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED75 10712 bytes
SHA-256: eb6d4e86b37a4ec2d50042effda1f4db7edb0ff92a8d5e6d58301773253b692a

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