Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fab70bbffa8d9ea…

MALICIOUS

PDF

73.4 KB Created: 2021-04-26 07:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9cde8d3e783411f73fa74183304c6ebe SHA-1: 3d49eb6bb383a78811821f42c3bd3458a243ec96 SHA-256: 7fab70bbffa8d9ea5a90e2d65431d4dd91b3591296ef89b084a2d4bd3fb0678e
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The embedded links, such as 'https://dafemum.ru/strik?utm_term=bose+acoustimass+10+series+v+price+in+bahrain', are designed to lead users to potentially harmful sites. The document's structure and embedded URLs suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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://dafemum.ru/strik?utm_term=bose+acoustimass+10+series+v+price+in+bahrain In PDF document text
    • https://cdn.sqhk.co/sezabaxo/jjegf5O/sexemojejaf.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/chicco_nextfit_ix_zip_luxe_review.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/hbibhgc/87528995614.pdfIn PDF document text
    • http://sotipidikukunow.getenjoyment.net/kugetarujogazo.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/5476185694.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/6icjmgf/picture_crossword_puzzle_word_guessing_game.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/j6HhjGn/11144920929.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369796/normal_5fe5b1a7af16b.pdfIn PDF document text
    • http://tamakar.xyz/29963050299zlrrr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386366/normal_5fd82878096fe.pdfIn PDF document text
    • http://nigemutekilum.mypressonline.com/79497885272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462678/normal_5fd3303f9f4a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380213/normal_5ff7e30de8412.pdfIn PDF document text
    • http://samoe-samaya.ru/sennheiser_rs_175_headphones_for_salevp4k4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tibugesifavetel.epizy.com/linksys_ac1200_dual_band_smart_wireless_router_ea6100-ca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a05b1f73-3f72-4d15-a918-5c75370ac93d/kinuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc2b8a47-866f-4573-a701-51c381fa2771/62515689149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42d06445-0700-4bc0-8e6a-cc7b38e511ba/14658916534.pdfIn PDF document text
    • http://nojerodupojelaw.rf.gd/mr._beer_brewing_instructions.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_off0000ddd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD6 5584 bytes
SHA-256: 5cb932738bf432e04f52d4639efaf5d84aec81c2178f840f29b0ab10b29f588e
font_01_sfnt_off0000f0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B0 11340 bytes
SHA-256: e567971cb6782cd72fc29c2aa6208cfc21f043e2d0ac156101e935d8d981a708

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