Malicious PDF — malware analysis report

Static analysis result for SHA-256 156146c82c435a6f…

MALICIOUS

PDF

49.1 KB Created: 2020-10-16 00:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 135cd45677746694279b0a580076db97 SHA-1: e00bb01faae3a3082d331a214979d7802b86dc68 SHA-256: 156146c82c435a6fededd267bd47ade41ce2266f3ed009a5f430d0e8caee8b8a
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/123?keyword=lucifer+imdb+parents+guide In PDF document text
    • https://site-1040374.mozfiles.com/files/1040374/79181934458.pdfIn PDF document text
    • https://site-1044312.mozfiles.com/files/1044312/58576408138.pdfIn PDF document text
    • https://site-1039671.mozfiles.com/files/1039671/wusilok.pdfIn PDF document text
    • https://site-1037101.mozfiles.com/files/1037101/sisifunoje.pdfIn PDF document text
    • https://site-1043530.mozfiles.com/files/1043530/84857818010.pdfIn PDF document text
    • https://sonilotosoj.weebly.com/uploads/1/3/1/3/131379329/5492730.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/4333548.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ligewajinaxi.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/397400.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/5928710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f87f7b221090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f8894608df9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f873d3105f2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f88ba8058cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f88b8c58c181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f882725d7109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f88bdcee68a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f88c1a5272ef.pdfIn PDF document text
    • https://site-1043442.mozfiles.com/files/1043442/rekuramurado.pdfIn PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/42274826554.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/ac3a101f-26ce-470d-bb48-d246df969a61/wupej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f505db1b-3974-47a3-b96c-14233fb8fce4/ninojevabevosujem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80ce47f4-f28e-4c5e-9f7d-a2324b0edd70/tojumesojigiluz.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_off000072fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FD 5296 bytes
SHA-256: 1023594781a37254658d88735a302ce47561d8e4610586e8f175b74a18aa7d4f
font_01_sfnt_off000084dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DC 10692 bytes
SHA-256: 36ec17009c9227cf3433f4be16f4480f7f712b650ff7f80f38760fa57e96a82c
font_02_sfnt_off0000a8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8DC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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