Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7eb8be6a6f9b7a8…

MALICIOUS

PDF

38.8 KB Created: 2020-10-04 05:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2c5eecc2233c958b0d7068a7e45c33f4 SHA-1: 0629968495a674525a4acc552ea3d0aa8d5796a0 SHA-256: a7eb8be6a6f9b7a8702771f0780ef42e5e73fcd579899511a08842a561edf7a8
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/pify?keyword=appaloosa+song+tom+petty In PDF document text
    • http://mowumono.roadclawtyres.com/uploads/1/3/1/4/131410399/bonajefokikome.pdfIn PDF document text
    • http://files.januszsupernakwebsite.com/uploads/1/3/0/7/130739740/vujedupalumuxawawud.pdfIn PDF document text
    • http://xoxiruzuj.zerowastelady.com/uploads/1/3/0/7/130775734/8536503.pdfIn PDF document text
    • http://files.bitbritish.agency/uploads/1/3/0/8/130874379/nawuzunawul.pdfIn PDF document text
    • https://site-1039833.mozfiles.com/files/1039833/39844436648.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/14163489249.pdfIn PDF document text
    • https://site-1036803.mozfiles.com/files/1036803/28365950316.pdfIn PDF document text
    • https://site-1037191.mozfiles.com/files/1037191/tuxegelagakipelagaxonon.pdfIn PDF document text
    • http://bivuf.highwaysnhoofbeats.com/uploads/1/3/1/6/131606289/vuzuxe.pdfIn PDF document text
    • http://files.marnixbreda.nl/uploads/1/3/1/4/131453807/682410.pdfIn PDF document text
    • http://nakavo.vallenduuk.pl/uploads/1/3/1/0/131070382/labolilasuk.pdfIn PDF document text
    • http://files.waysideresources.com/uploads/1/3/0/7/130775400/pinopibek.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/f5968543-74ea-4398-8b8d-f4855f495cef/fidadevamukuvofudukidaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a832bec-8a6c-4b46-9936-fc6c06db2d7d/42462330373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4047c35-8c8c-4efc-a26a-05d407da4646/40776550033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a02adc7-3394-450a-8a88-ac9624f48e20/24537836610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4221fe7-8c07-4583-8f8a-3eab9f659a2f/70924461490.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_off00005a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A88 5132 bytes
SHA-256: 2f2f85eb52f5fc661de44f6c9862a52c9bfa6634d482b313347cfed1091eed47
font_01_sfnt_off00006bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFA 10052 bytes
SHA-256: d0720231787857047d62ca5e9f63a43f968538ae9c4a34b7fc5c339302a2f21f

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