Malicious PDF — malware analysis report

Static analysis result for SHA-256 55b5338ee446a4f0…

MALICIOUS

PDF

66.6 KB Created: 2020-11-20 15:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 366eb72e17636a07fe16878dd56329ce SHA-1: d0795bfe40725ad875e69a7a714e538b9963b530 SHA-256: 55b5338ee446a4f027981ac090112e11199dca09bf2cffd15418064ee3e1ef2d
244 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to multiple external websites, one of which is identified as a malicious redirector. The document's content, though heavily obfuscated, appears to be a lure related to a book title, suggesting a phishing or malware distribution attempt. The presence of numerous links to disposable hosting and a malicious redirector indicates a high likelihood of malicious intent.

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://ggtraff.ru/strik?utm_term=istoria+culturii+si+civilizatiei+ovidiu+drimba+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f8744c3c272e.pdfIn PDF document text
    • https://lizosodomig.weebly.com/uploads/1/3/4/3/134327767/5ddb7a843d263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444369/normal_5fa864a1e7ed0.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/9427574.pdfIn PDF document text
    • https://fosogaji.weebly.com/uploads/1/3/1/4/131455903/575271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f871539c10fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_5f9e4d9656959.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/mupibavog.pdfIn PDF document text
    • https://papukelub.weebly.com/uploads/1/3/4/6/134666119/f0f97c29005eae.pdfIn PDF document text
    • https://warajepij.weebly.com/uploads/1/3/4/6/134608856/fc19811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_5fa3ad333b025.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c3a5de-971a-4b5c-94bd-05f26bb376a0/nedawufulufodotogivaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c8e33a-8f8e-4a23-a28c-40dcb028f58e/87615534102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de324c3-9a88-4588-a339-1a710c8a8966/being_alive_company_sheet_music_free.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_off0000c49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49A 5488 bytes
SHA-256: 004d6bbc6be8513b62d4043bd5dabbbab9f916fe66384559989a938e90fac524
font_01_sfnt_off0000d735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD735 11376 bytes
SHA-256: 6dea3b1fc98b0a0d67f017458d119e1db26eccea60b8b5eaa599df798052a8e8

Open this report in the interactive analyzer, or submit your own file for analysis.