Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd226efaba67582…

MALICIOUS

PDF

93.7 KB Created: 2021-05-29 04:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9ab47d03a664d57ef578e592e2a6f242 SHA-1: 5991e80572ef049cd56b2eee934769e52269dbd3 SHA-256: 9fd226efaba67582905c7dfabd97cc38bd49a61df97d3e9aca039ba06942d435
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to generate traffic or distribute malicious content. The primary URL, 'https://fokemale.ru/strik?utm_term=why+does+my+old+cat%2527s+poop+smell+so+bad', suggests a lure based on a common search query. While no scripts were explicitly extracted, the PDF structure and extensive link farm heuristic strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://fokemale.ru/strik?utm_term=why+does+my+old+cat%2527s+poop+smell+so+bad PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407100/normal_60418712e4d3f.pdfIn PDF document text
    • https://fomutifimo.weebly.com/uploads/1/3/4/5/134594787/xibebogoti.pdfIn PDF document text
    • https://rigafefabapamum.weebly.com/uploads/1/3/4/4/134486683/kuluruwizosadodo.pdfIn PDF document text
    • https://lojijuzirikoza.weebly.com/uploads/1/3/4/5/134593465/649af6a70e0235.pdfIn PDF document text
    • https://mowerezudajam.weebly.com/uploads/1/3/5/9/135966589/jilofi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450504/normal_602a1abad0f36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452609/normal_5fccbdb698049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418199/normal_6011af220caea.pdfIn PDF document text
    • https://giwafadewixagi.weebly.com/uploads/1/3/4/3/134369241/xuzajiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443610/normal_5fdfd37e7771e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_600fd5d430ff4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_5fd14affe7bda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426280/normal_5fc97adb0fad1.pdfIn PDF document text
    • https://gisevivejomu.weebly.com/uploads/1/3/5/3/135393920/996868.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475204/normal_5ffa8692b573f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464851/normal_5fde4fa3307dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503617/normal_60075dd81896c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_601745a8bfc22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_6057010934c5b.pdfIn PDF document text
    • https://busuguzokiw.weebly.com/uploads/1/3/1/4/131406797/8327052.pdfIn PDF document text
    • https://linepapimufuto.weebly.com/uploads/1/3/1/6/131637640/lulutebatug.pdfIn PDF document text
    • https://guduzuzej.weebly.com/uploads/1/3/1/6/131606672/sezig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_6057de06eee6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490128/normal_6011dc8adff35.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_off00012f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F25 5504 bytes
SHA-256: 79b2b70cb701e66c17dbbe6a7ee5404c5961a62a2c525dfdd726a96183568710
font_01_sfnt_off000141cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141CC 11548 bytes
SHA-256: e0ccfcf3d6a9075324a31776a31a6a7280f4e732dd63c4b9459e58c0f579ce39