Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e7b5060ee974ed…

MALICIOUS

PDF

53.5 KB Created: 2020-11-09 12:54:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 044c90ff3dcf3eb6d0dbbcf4dab54670 SHA-1: 683a613cb9e0164582fffccba21d8db7f9bb182e SHA-256: 87e7b5060ee974ed0f01582452c28e0eb83e24a694b88d2d1cec0ba1a54f31fe
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://traffine.ru/123?keyword=potrero+malabon+city+zip+code In PDF document text
    • https://dewubolisevibe.weebly.com/uploads/1/3/4/3/134318954/7993043.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/xelikanotuzifaja.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/kakanekuwilijiji.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/c41c42b8.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/715115.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/4743978.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/zutogudupitolosuvire.pdfIn PDF document text
    • https://vekaluledezo.weebly.com/uploads/1/3/4/2/134235689/7741374.pdfIn PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/0700d8519.pdfIn PDF document text
    • https://lozugukavokukes.weebly.com/uploads/1/3/4/3/134357100/jegunobuzosirewem.pdfIn PDF document text
    • https://nepagezefo.weebly.com/uploads/1/3/4/4/134472827/selebukirilefotu.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/1d2dbeab-ab1c-4505-b151-a0833407ea63/somesoguvogiluratudozaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c309bfa0-df13-43db-a55d-8e86147db1c4/nudutadibero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f766ae3f-5b06-4b47-bdea-21deca44d2ea/wexeginadanorujofopuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10207951-47de-4dac-9919-58d50695d7cc/tugawibopasirubepudebaz.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_off0000927e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x927E 5336 bytes
SHA-256: 0473af30f11017a80ff4efe58708fbf955fb90b84378bc23fafad69127df37a5
font_01_sfnt_off0000a48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA48F 10920 bytes
SHA-256: 2a15379edadca0ab91d7282d39298e47656ac399b4eafa90034d766bff2bf625

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