Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48cd730d0ed77a9…

MALICIOUS

PDF

49.5 KB Created: 2020-11-09 12:16:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 2d1711251a8f0687f763ef7cadfdf4ea SHA-1: 98079e014235fe31bd2bf5e35494cfc3458cb53b SHA-256: a48cd730d0ed77a993ee469546cb9d902f42e551c9a1866fb1559bd0f1fd6f81
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=texas+dl+90b+printable+form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379474/normal_5fa49e1fca9f7.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1377318.pdfIn PDF document text
    • https://tenanetudoji.weebly.com/uploads/1/3/4/2/134266315/ruvuxatufav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451376/normal_5fa7940184e1d.pdfIn PDF document text
    • https://pamuvomamutafa.weebly.com/uploads/1/3/4/3/134305197/ea929.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/detobo_sanulinazenobig.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/wevaso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tudawufed/48040467396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/648632e5-7359-4aec-96c2-9546f82a6ffd/schedule_a_fedex_pickup.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/xufubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20cb1951-f92f-4c49-bffb-1cf7c364640f/19172080352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53e449af-6c2c-4e6a-ae07-1cc6f8c30025/xixed.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/nibavizenedepomomejikifeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/757214a3-483e-4a2e-bc56-f9d330d9d649/53953514072.pdfIn PDF document text
    • https://s3.amazonaws.com/kalufizefem/rojedabitajifunovid.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/bottom_up_processes_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc86af71-67e0-4c32-a436-75f8bd7b034d/lazuvirexutibezezedapowi.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_off00007f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F73 5644 bytes
SHA-256: 3538c92f7e0bc2525d1f1c9fc3266d34017914ed3d239f1965775b2b7f6691e0
font_01_sfnt_off00009281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9281 11300 bytes
SHA-256: 660edd25b7b50a5707efdfd19b66d5d8e67b89fd1d2c65d0fe5d6a6574a32cb0

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