Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4d4b32899c33c9…

MALICIOUS

PDF

73.5 KB Created: 2021-01-05 16:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3ade40a85720c0470b2497f67fe5c025 SHA-1: e0bb088a6586893b3c048fc61de57c8aaefcebbc SHA-256: ed4d4b32899c33c9e443215c548c62e1d39cb09d7e0006c0d0c2dc91a73debe8
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ggtraff.ru/123?utm_term=religion+in+malaysia'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of a malicious redirector URL strongly suggests an attempt to lure the user to a harmful site, aligning with phishing or malware delivery tactics.

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://ggtraff.ru/123?utm_term=religion+in+malaysia In PDF document text
    • https://static.s123-cdn-static.com/uploads/4403429/normal_5febbff3b92f0.pdfIn PDF document text
    • https://toxutumopomepe.weebly.com/uploads/1/3/5/3/135327812/f309d6cea848fd.pdfIn PDF document text
    • https://luxovozudenez.weebly.com/uploads/1/3/4/1/134108910/d9580eb5ab6603d.pdfIn PDF document text
    • https://zulufiki.weebly.com/uploads/1/3/4/6/134662959/verifopajola_gasafafaropijal_sosekamemedeb_jetofi.pdfIn PDF document text
    • https://livadekawa.weebly.com/uploads/1/3/5/3/135317457/gotizumimiwijefoxije.pdfIn PDF document text
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/japara_tuvorijubop_zebuluronedona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5fc238c7955d0.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/nezanurugega/philips_avent_manual_breast_pump_chemist_warehouse.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/backup_android_contacts_without_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a79e258-eb9f-4872-97dd-dd5d9a614150/muzunosirip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eab0e47-bb16-4f3a-8633-27acb145390c/fox_racing_clothing_outlet_store_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01367ea2-9503-4de6-9b62-6176b9f4732b/59809187693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a08f1d-5e96-4bd3-b6b2-aecdbf94b287/holt_mcdougal_larson_geometry_textbo.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/dijududaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b5e3c3-61eb-446d-ab6d-0372f353ec85/dry_neal_shusterman_characters.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_off0000e527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE527 5020 bytes
SHA-256: 8116a38be9eb199565b6401849cb24f00b0b42af0ba538008221e2972cce1f7b
font_01_sfnt_off0000f637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF637 10268 bytes
SHA-256: f35ba8571d261efeed284184641025b4f267b47615e3be77a5d660416037350e

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