Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddfda7a6b20ed37f…

MALICIOUS

PDF

84.8 KB Created: 2021-01-27 18:27:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 33958a10a83b487cd05a1b9ebc40a740 SHA-1: 9dc210438f1d3fb9421b7954b51e98f05d024cb2 SHA-256: ddfda7a6b20ed37f3074bf048b9780a7221f9be69fa32e0869d5a18f1ae34e8d
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting services or redirectors, indicating a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of attempts to redirect users to malicious sites, likely for malware distribution or credential harvesting.

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://yafferge.ru/wb?keyword=patagonia%20men In PDF document text
    • https://tadinitalu.weebly.com/uploads/1/3/4/7/134744808/lonesilapikuxetotir.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/fhiihhj/live_cricket_match_app_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/tijhcih/wijefupozazeru.pdfIn PDF document text
    • https://tozirodewekopax.weebly.com/uploads/1/3/1/4/131453541/xazezetubejizop.pdfIn PDF document text
    • https://cdn.sqhk.co/moleselofa/MhbLghT/the_maze_runner_3_full_movie_download.pdfIn PDF document text
    • https://tugagofinose.weebly.com/uploads/1/3/0/8/130874012/zatikofokikule.pdfIn PDF document text
    • https://pabitunevogozut.weebly.com/uploads/1/3/0/7/130776295/3480008.pdfIn PDF document text
    • http://ca-management.website/pressure_washer_extension_wandmu9rd.pdfIn PDF document text
    • http://brumbum2.xyz/921390311210x2r0.pdfIn PDF document text
    • https://dufofumiwiz.weebly.com/uploads/1/3/5/3/135309849/9fa5e21.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/bff49e454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5fd18b47ed995.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367303/normal_5ff502296eaa4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448347/normal_5ff50de465ecc.pdfIn PDF document text
    • https://xifupanudolegu.weebly.com/uploads/1/3/1/1/131164204/zipuwovigilide.pdfIn PDF document text
    • https://sojofiveku.weebly.com/uploads/1/3/1/6/131637763/xijituk.pdfIn PDF document text
    • https://zuriloteva.weebly.com/uploads/1/3/4/6/134623588/7890539.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/jWZgjha/let_s_play_basketball_3d.pdfIn PDF document text
    • http://vinograd.io/nulilogupumanewunuwegagfnb7.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_off00010b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3E 5272 bytes
SHA-256: c3108c7785a6f85d12a93799892c98be0dd105465760776ea91db39511e44320
font_01_sfnt_off00011d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D02 11576 bytes
SHA-256: e429668e48ce45e46d876dde4292e71d72ca1e2b61c644bdea78dcc87ed8df91

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