Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8dd9ae66ee63d3…

MALICIOUS

PDF

36.9 KB Created: 2020-10-07 15:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dc4baad22936a288cda5989bed9c3f3c SHA-1: 766ddfd250730f27f7b73a6782a60cd8f4ae9a20 SHA-256: 6f8dd9ae66ee63d31296de2835f212ecbee6d4a9d4a7462c9cbf5b6b77d8951e
184 Risk Score

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://cctraff.ru/strik?keyword=100+german+short+stories+for+beginners+pdf+free+download In PDF document text
    • http://duvogata.pawsforthoughtcatcafe.com/uploads/1/3/1/4/131454093/razekiwa.pdfIn PDF document text
    • http://files.paintmyfeeling.com/uploads/1/3/0/7/130738921/d92d2e.pdfIn PDF document text
    • http://tupageni.pathwaysunited.org/uploads/1/3/1/6/131636719/woxuzibe.pdfIn PDF document text
    • http://files.wearecvsta.org/uploads/1/3/0/8/130873851/xevolasinutej.pdfIn PDF document text
    • https://site-1038717.mozfiles.com/files/1038717/49212083728.pdfIn PDF document text
    • https://site-1039621.mozfiles.com/files/1039621/vizowowegodejovojire.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/zizejadubilifozawereras.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/94fa868c-04a9-41bc-81d8-772d421023d9/8497219915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d002ad89-2a09-4d1c-b87e-d6ae8d193078/nezanexutekolopone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b3727d7-22a4-4c2c-b380-770537977451/43572182026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/361677a4-85f1-4ae9-9805-d34b54aed8c5/94682271244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e98e0d7-4a61-485e-b2a8-10ae7ade4106/18947678946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4980951c-5f0c-4496-b779-4f07b463990e/82680421459.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_off000051e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51E8 5784 bytes
SHA-256: def466d42ad32ff436be6170d5edff00929b5f148f02689e76f4a2096123ffdf
font_01_sfnt_off0000657f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657F 9752 bytes
SHA-256: 5e0555256a6bd0adb76c52486760b60d0ffcfc5d5fe68c768eb9271471f81f7a

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