Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed068d2cc4b2b24…

MALICIOUS

PDF

80.3 KB Created: 2021-05-29 17:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f6c45e1ff4002c64d91f88b51bd0680f SHA-1: d23fc288a1ba16702a057d977a9a83d2397ca9ec SHA-256: 6ed068d2cc4b2b24a2b3583dee2338afe21e56383b16b2337e3a8f314e809807
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, and it contains a large number of embedded links. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically `https://crophysi.ru/strik?utm_term=the+misfit+of+demon+king+academy+season+2+manga`. The document also features a link farm with 30 external PDF links, many hosted on disposable domains, suggesting a potential SEO manipulation or content distribution scheme. No scripts were extracted from this sample.

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
  • 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://crophysi.ru/strik?utm_term=the+misfit+of+demon+king+academy+season+2+manga In PDF document text
    • https://xopusetimova.weebly.com/uploads/1/3/4/1/134108877/videpuvarira-joberawula-delifirebijelu-runenixidomopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443824/normal_6052e300d42fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422909/normal_5fcd01c660d7c.pdfIn PDF document text
    • https://kirebokiva.weebly.com/uploads/1/3/4/6/134634247/nofase-bobos-taxodijalowom.pdfIn PDF document text
    • https://poparakubeti.weebly.com/uploads/1/3/4/7/134717850/7489226.pdfIn PDF document text
    • https://mitixofixomu.weebly.com/uploads/1/3/4/3/134333727/ca63d65.pdfIn PDF document text
    • https://givadebar.weebly.com/uploads/1/3/1/4/131437750/86f74d83e17ebf1.pdfIn PDF document text
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/folori-vefobi-menamepaxeji-warazudakakoxeb.pdfIn PDF document text
    • https://napuvenorabinu.weebly.com/uploads/1/3/4/4/134490891/9585309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_600be6f36cef9.pdfIn PDF document text
    • https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/1b4d6347eae5.pdfIn PDF document text
    • https://vijamosikafej.weebly.com/uploads/1/3/4/7/134772382/903f97b3479f47.pdfIn PDF document text
    • https://lufowatevumidoj.weebly.com/uploads/1/3/4/7/134704320/4aea07b6d71da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449417/normal_5fd27f40ecf94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372735/normal_5fe0237cb350b.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/2cc99b38-d6c0-48df-8187-8609c2b95520/how_do_you_enlarge_a_shape_by_scale_factor_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51588e6-43ed-48cf-b797-3d6fa201c161/20148284961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05b9cd98-5ff3-4850-96aa-a0f27d04fe70/how_to_use_wiimote_on_dolphin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab1a0b0-cfad-4974-8c00-f798e5073191/i_am_poem_template_google_docs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d53a5779-a26b-4b61-8f46-415825d5642a/mivigetor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eca3f16-05c9-4d21-828d-3965046bf9e9/zoboxigiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/673bc706-97ad-4eae-92c9-58f46999a8c4/78079018804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aea6d54-b641-42ee-a107-8dbe8d52ee25/kusujaruwalewavepizamipe.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_off0000f7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F2 5552 bytes
SHA-256: 47d1a2abe60c5c7c2299b62a3c47d682579439f42fcd1bd2de83bdde825b6f1a
font_01_sfnt_off00010abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABE 13228 bytes
SHA-256: 3889113495a1059debaad1ba660a1b3ca72fc8645e83a6722b4a62681d5b0512