Malicious PDF — malware analysis report

Static analysis result for SHA-256 c213b113843e4d1d…

MALICIOUS

PDF

43.9 KB Created: 2020-10-09 15:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 095e92938ebc99df71fb9a8f9a886445 SHA-1: b9188d6a8b1ad39a37eedf652d6fa2d0ec00f75e SHA-256: c213b113843e4d1db996ee176543af746b76de3409ab1b7737e7d286df9ff18d
184 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to disposable hosting and redirect to a known malicious URL. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Donkey Kong 64 guide pdf', suggesting a phishing or redirection attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://gettraff.ru/strik?keyword=donkey+kong+64+guide+pdf In PDF document text
    • http://files.parklanestablesponyclub.com/uploads/1/3/1/3/131379015/foboninimusuwate.pdfIn PDF document text
    • http://selegi.faithcombible.org/uploads/1/3/1/4/131454731/a93429648ce4.pdfIn PDF document text
    • http://files.dominionarchery.com/uploads/1/3/1/4/131453393/fa2f38a1efe4e04.pdfIn PDF document text
    • http://files.tjmase.com/uploads/1/3/0/7/130775825/vuwolafo_numabixeduta.pdfIn PDF document text
    • http://files.mahajosh.com/uploads/1/3/0/7/130739621/pepate_xikunokobenudid_sagazepipi_papowimenafavob.pdfIn PDF document text
    • http://files.ironsharpeningoursisters.com/uploads/1/3/0/7/130738929/9765170.pdfIn PDF document text
    • http://files.the608store.com/uploads/1/3/2/7/132710657/6ed857.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/c021e87e-eca4-427f-ae1a-915d554bf531/sojixidofiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a6528e9-bec2-46c5-b673-e0d94e02270e/dadumulodezaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d83212c-56af-49f5-96f9-fb955e69bedc/futagitafugaduwawidoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4401e9-f2c9-4fc8-871f-6528c931f333/61313941821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0bc6262-f0c9-41c2-8344-4b6f039bf095/manupanixurutolat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6746db9-2fbf-4cf7-82c8-5035cf87b1c7/52633619675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3cba7c0-1ccd-49c2-baf0-8c1c806effe3/2360974431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3571775-2faa-4e6b-bbab-98b6866c5227/20872648263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dbf5449-693e-4ed3-a61b-c2e971d561ed/98199328121.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_off00006d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1B 5100 bytes
SHA-256: c866732259eeff491e80e896239df64f95f9a197ad02fdfc77de75b352b4d253
font_01_sfnt_off00007eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB1 10584 bytes
SHA-256: ca8a586ae026c8b99e3e377004b9af9babd2b63ef2b44fe2c6634339ef509f8c

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