Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0d67e95f27051f…

MALICIOUS

PDF

58.4 KB Created: 2020-09-30 09:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c32545be0c6deb8a526a883cbfcb2675 SHA-1: ee6dd41c06ae68f22401c6fecebd0fd8302080f0 SHA-256: dc0d67e95f27051f46421eaaa7e0eed1c7a48499e8e822b51acdf88b7f266f80
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=catholic+bible+in+urdu+pdf In PDF document text
    • https://site-1036851.mozfiles.com/files/1036851/joratavetufoxik.pdfIn PDF document text
    • https://site-1037180.mozfiles.com/files/1037180/94138829213.pdfIn PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/51743329277.pdfIn PDF document text
    • http://mixik.alittlebirdie.co.za/uploads/1/3/1/3/131384721/tezided.pdfIn PDF document text
    • http://files.jackvisuals.ca/uploads/1/3/1/3/131381722/xetetuxotoronafuvo.pdfIn PDF document text
    • http://files.oldtreefarm.com/uploads/1/3/2/6/132682535/21beea30b40191.pdfIn PDF document text
    • http://files.onewomansomanyblogs.com/uploads/1/3/1/0/131070911/3600800.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://uploads.strikinglycdn.com/files/8e96bce5-9d95-46d4-9cc3-8495e92a89cd/47430129340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b528a287-c6c0-4c1a-8274-39077df5d104/7968977844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8a979b2-55da-4efa-85f2-96638c803d8f/51561704597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a8b990-3d08-4215-8ca2-fedfc414f40a/40099048465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c81040f5-92ba-4e8b-82b7-c1d857de255e/xilepafalabuguxon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73958ff-c852-48b2-ba93-1c35bcf8d91c/1654103826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a668ed-a8eb-495c-a3b2-97fb58d1788d/minuxusasepasek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ae3d86-7032-4d35-89ab-77c49f0590b5/33181315330.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009ba4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9BA4 27396 bytes
SHA-256: d76c9112b4d02db027cc154aa35c51b7a726a8bf006d7790e368ff51cab6e242
font_00_sfnt_off0000679e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x679E 5112 bytes
SHA-256: 11495bae2aa3c290f9bc26a99bd2dc4c65f632d9c1d84d3dc35b103d79cc7256
font_01_sfnt_off000078ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78EF 10080 bytes
SHA-256: 259475202f25957d188e462102c5695199c993ed861eae6266b01f9c136ed384
font_03_sfnt_off0000cc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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