Malicious PDF — malware analysis report

Static analysis result for SHA-256 17637d246a117660…

MALICIOUS

PDF

47.6 KB Created: 2020-11-03 21:03:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4f1ed30aa41badc7de00c2a5416cbec5 SHA-1: b8aeca15aac9cd9ed7ae53e0dae47d0d9d44e59a SHA-256: 17637d246a1176608ce97c3dac17b99af84c8a3abe525c99965f6a2d0caa1435
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, with the primary one leading to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a reference to 'Mortal kombat gba rom hack' and the malicious URL, suggesting a lure to a potentially harmful site. The presence of a link farm heuristic further indicates malicious intent to distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=mortal+kombat+gba+rom+hack In PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/7a4f87f3163d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380228/normal_5f8fa95441fe8.pdfIn PDF document text
    • https://lonunibulitog.weebly.com/uploads/1/3/4/4/134498578/42cbc80930502e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409623/normal_5fa09bb5252e0.pdfIn PDF document text
    • https://wagizubim.weebly.com/uploads/1/3/4/4/134470033/dubujopeb-xejumozugipuneb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_5f98248d9e81c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450506/normal_5fa09be3118d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f9f7e3e0b13c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gozilum/82505647934.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/functional_plant_ecology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d921114c-8234-46f1-9d5c-24e577393d3a/japanese_chin_for_sale_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0b3257-271b-4098-a2dd-b810105b1e17/sisterhood_is_powerful_anthology.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/pitonedejipovara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/197daec1-07bf-4369-ab87-155ba8651ab5/toro_20072_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000573d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x573D 4760 bytes
SHA-256: 56518e32a2972a393add75f48bd97b6e2b1f0371345b34e5f0eddaeb04773b6b
font_01_sfnt_off0000676e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676E 10764 bytes
SHA-256: b473da32118afd1c6861fb35c406a6329d812ec2c38300d0419a04e92aca9761
font_02_sfnt_off00008c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9A 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
font_03_sfnt_off0000a161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA161 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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