Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b59be42d55c1db…

MALICIOUS

PDF

51.3 KB Created: 2020-11-07 18:11:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: da848d88a2de04ff2a5822eb4af7a765 SHA-1: d5030fd4a684234ea6e2f6b7dceb3b56f3f96ec1 SHA-256: 94b59be42d55c1db0d04ae6010eb1db1e3af4407d90622b22b63178c57c462b6
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://revibafejinaj.weebly.com/uploads/1/3/4/4/134485322/bunikiko.pdf.
  • 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=madison+wisconsin+white+pages+directory PDF link annotation
    • https://revibafejinaj.weebly.com/uploads/1/3/4/4/134485322/bunikiko.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/pivem.pdfIn PDF document text
    • https://nujuwededewomoj.weebly.com/uploads/1/3/4/3/134305400/3679390.pdfIn PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/fevijazonakimaxuj.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/pofumapetat/wireduxuzusilad.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/certified_beer_server_study_guide_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/daziwitisu.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/20_point_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e4a2a15-a382-46c3-9afa-02e9a89890d8/80249628335.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/70263419404.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/95519257918.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/xemosiwarix.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DA 5292 bytes
SHA-256: eb36b90353de6b4cd065faeebc6fafcbb92903d23d7f7c4cd90ecdce47c2e7e3
font_01_sfnt_off000088e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E5 11504 bytes
SHA-256: 41f8ccba6816288a56b1ba90495a6db78dc8f04d7be1f16d4563d8b62785eb6a
font_02_sfnt_off0000affe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176