Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0afdc97c0cbc325…

MALICIOUS

PDF

70.2 KB Created: 2021-03-05 07:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3939b40dd569f07f5ccc05509941c9a3 SHA-1: 91d9c689bc58b662dd4403cb5adea687cd7a3576 SHA-256: c0afdc97c0cbc325d9c8d5e5547d80ea7dbe754f27db379aaa60222984ea979d
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 hosted on disposable domains, indicating a link farm or phishing attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly suggests maliciousness. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/award?keyword=5e+spell+critical+hit PDF link annotation
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/guxukupotakusujujil.pdfIn PDF document text
    • https://peninugeba.weebly.com/uploads/1/3/4/6/134666339/pudul_jufatepi_torolutusuzu_fepexeni.pdfIn PDF document text
    • https://lesapexif.weebly.com/uploads/1/3/1/6/131637780/kuxasuvafizazibi.pdfIn PDF document text
    • https://wekexodaxax.weebly.com/uploads/1/3/4/7/134713384/rawetoviporovi_zunida.pdfIn PDF document text
    • https://pigulanofalo.weebly.com/uploads/1/3/1/4/131406379/7533830.pdfIn PDF document text
    • https://dataremidesop.weebly.com/uploads/1/3/4/6/134697992/dabitoduzisux.pdfIn PDF document text
    • https://tefakunuti.weebly.com/uploads/1/3/1/8/131871494/2576110.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/357fe32688d75.pdfIn PDF document text
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/6140431.pdfIn PDF document text
    • https://nepazumikad.weebly.com/uploads/1/3/5/9/135958915/niguloxutuw.pdfIn PDF document text
    • https://fikadodovawewa.weebly.com/uploads/1/3/4/3/134320255/mijilugabupoxowe.pdfIn PDF document text
    • https://kulojimafad.weebly.com/uploads/1/3/4/5/134518235/sovebitaforaxudotozu.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/mefonevimimix/52557100197.pdfIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_66279d22473049faa6487840b3cddc60.pdf?index=trueIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_e3847f06077042b09a14e1a75878b302.pdf?index=trueIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_1df13afdfa1c4771b6fd64b75157ad38.pdf?index=trueIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_287703ea03a343c89b8eebebfbe400e8.pdf?index=trueIn PDF document text
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_03b3aa3dbd06465e8cdae5cc686a592e.pdf?index=trueIn PDF document text
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_b5865fa2314f47f89e5be9dd193aa099.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/76489940656.pdfIn PDF document text
    • https://b73b9701-b1df-43be-b031-73419f87697c.filesusr.com/ugd/bfbd96_cbe518bb3e0d4670a74ec22bee536ee0.pdf?index=trueIn 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_off0000d593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD593 5048 bytes
SHA-256: 179bd83ec3406c71a058a62c04f80667eba33115799605445c639e9ce907e14f
font_01_sfnt_off0000e6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B7 10868 bytes
SHA-256: 8f3623ca59d6586ac8525540b8a4db756c96f97fcd17d0eaf8e6ae9e4bd2744b