Malicious PDF — malware analysis report

Static analysis result for SHA-256 101f7babce193b3e…

MALICIOUS

PDF

44.2 KB Created: 2020-10-02 10:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 892f682c1a041047d9b54f558a29d5cb SHA-1: b60abccfd40e150907e160174756faf11848f231 SHA-256: 101f7babce193b3e2651067d82118ff5310a7ff28ea789aa128b6599aab4ead3
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=revista+natura+ciclo+18+2020+pdf In PDF document text
    • http://files.melissalamoureuxlmft.com/uploads/1/3/1/0/131070912/2f0510cff.pdfIn PDF document text
    • http://tifanu.glossstylestudio.com/uploads/1/3/1/4/131454899/kerug_xafogolep.pdfIn PDF document text
    • http://files.gasthauszumpiano.com/uploads/1/3/1/4/131408209/jalof.pdfIn PDF document text
    • http://files.dots2drops.com/uploads/1/3/1/3/131397940/2cae52bfba.pdfIn PDF document text
    • http://files.therealdealwyatt.com/uploads/1/3/0/7/130740242/nekisudadakid_zijovuzusuvi_zigisilow.pdfIn PDF document text
    • http://vozokifo.lonestarweimclub.com/uploads/1/3/1/1/131164250/db9b7a80.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/466adbfc-e697-45d0-813c-4d7ec154248e/xusavamujezidusuxuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/affe5948-f2ec-4c05-a97a-fd9e236c6f4c/selilesisazolovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a79a2c6c-ddb0-4cb3-9997-83c78a35e913/xumekidisobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40c94ce-303d-49e1-89ce-1744e87863d2/wozisalisukos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3008/6297/files/35073155322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9769/4114/files/nafafiwapikejovuwat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8094/1721/files/delunixinojope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1572/4443/files/the_crucible_themes_and_symbols.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_off00006ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA5 5736 bytes
SHA-256: 481c6767eb9e026f70f1ee53759a320d17be3cacfa0573b6e868d8c48a2d7489
font_01_sfnt_off00008048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8048 10440 bytes
SHA-256: e4cd28afc4e7e3c5e8ed4ec5397f73fdd934a581bd32ac304b33e2e0ff8ac803

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