Malicious PDF — malware analysis report

Static analysis result for SHA-256 548dab9989d0f954…

MALICIOUS

PDF

67.7 KB Created: 2020-10-11 02:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 95d3179bc7061e4f27711dab4abd1ab8 SHA-1: a7d73713e6a0ea49cd0012fe17c322a3a11a0b3f SHA-256: 548dab9989d0f9547e18733c73494e3ccb9853c6ee5c21079222597447e8f904
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://gettraff.ru/strik?keyword=my+hero+academia+episode+3+english+dub+facebook In PDF document text
    • http://xepus.smartlocal506.com/uploads/1/3/2/6/132681670/rakolumakavo.pdfIn PDF document text
    • http://files.sharonstaffordmetals.com/uploads/1/3/0/7/130739603/6527084.pdfIn PDF document text
    • http://files.motherduckingfarm.com/uploads/1/3/2/6/132682989/2e6b05f1cea62.pdfIn PDF document text
    • http://sipominu.apwilder.com/uploads/1/3/0/7/130740607/tuvan_baxabajuxixivag.pdfIn PDF document text
    • http://folusitap.kwmulinixtech.com/uploads/1/3/0/7/130775766/pidufipasukaxat.pdfIn PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/nidesozodogupujesivewore.pdfIn PDF document text
    • https://site-1037218.mozfiles.com/files/1037218/99770681457.pdfIn PDF document text
    • https://site-1044067.mozfiles.com/files/1044067/95170837659.pdfIn PDF document text
    • https://site-1038478.mozfiles.com/files/1038478/dogateguzujixeruti.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/2d70339e-e91b-460d-954e-a0f34abdf02b/95864382926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a980fc-5941-4512-a824-998f99fb756b/sasaxanunavifokukuvofini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d575866b-ae3b-431e-ba24-c54503731031/72122581399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96dc8280-ea49-41d7-95ed-042c2c739d57/51740566421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/771c80ad-09c0-4611-89c5-9e3d4e6c08a5/wiluliruvetodos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6baafe0c-d48a-4366-a39a-f5e2cf78e8b6/buzebitafofamuw.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_off00007e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E33 21712 bytes
SHA-256: 98c74bc77ef4b83f967bfc31b73c958615f512e9d50b4c9278599a29d87dae05
font_01_sfnt_off0000c359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC359 6044 bytes
SHA-256: 6b1547bfb322674dbe75708876af2ac38d73e3d5c11e9c67a06676175bdb90fd
font_02_sfnt_off0000d7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D0 13080 bytes
SHA-256: d300d6d6a6f5973ba97fdf79144e6eccf774a051234ca9097119beddddd30af9

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