Malicious PDF — malware analysis report

Static analysis result for SHA-256 03958adf7395818a…

MALICIOUS

PDF

42.3 KB Created: 2020-11-06 19:18:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 9522368257def8960412324b64cd574b SHA-1: c382372275c9f6981aedabc424e786add066b898 SHA-256: 03958adf7395818a695e180b2b8153317da9c51e3466f3e2bbc082faed06bb97
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/aws?keyword=minecraft+witchery+mod+pc PDF link annotation
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/zefozupekugejafepabu.pdfIn PDF document text
    • https://moxowikoxub.weebly.com/uploads/1/3/4/0/134096036/038409eedf29442.pdfIn PDF document text
    • https://fanamariruzatad.weebly.com/uploads/1/3/4/5/134514157/997db7f4998dc4e.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/cb3032e4-9868-47af-8e3d-8e1c99040bcd/lego_marvel_super_heroes_2_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/nsk_roller_bearing_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/kevamup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2414420-638d-4dd5-a429-016e7308cd73/lerowezurowepupifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9fc44c-3466-467b-8638-1ebffc95a95f/begetuxulamopipugudufid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fa80e06-3678-40b2-960c-a9fdafc164a3/93773347678.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/nekevexulevefaragonuje.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5021 5384 bytes
SHA-256: 8af9b184a507a7ba95ed8c162483df477bdecf58c89ecd978a5c7b56f0db7c11
font_01_sfnt_off00006272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6272 10352 bytes
SHA-256: 126105ed991890015a8075149ec3de2d7ff0f05f191e3e710f4d3a8a81f79a05
font_02_sfnt_off00008611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8611 16064 bytes
SHA-256: b2cf57f29eb3b5e0c174876c58b70ef8fadd81916e6e05a17acc225f9629e7e7