Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf9b64582b83ee5…

MALICIOUS

PDF

88.3 KB Created: 2021-03-27 10:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c5bce9b22b1b312a877c21b7d992e614 SHA-1: ab9234d41ae7b5aaae281c3d0596f4a0136aadf6 SHA-256: bbf9b64582b83ee5e2a0d565cdd3206c1bc1ab7b05a5bd66dda7b90c77c1fbc5
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links, many of which point to disposable domains and are presented in a link farm format, suggesting a phishing or content-luring scheme. The ML classifier strongly indicated maliciousness, and the presence of external URIs further supports a malicious intent to redirect users. No scripts were extracted, but the overall structure and heuristic firings point to a malicious document designed to trick users into clicking through to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://pelibifir.ru/award?keyword=balasaheb+shinde+english+book+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372737/normal_5fcaa0ce2dd80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483354/normal_601f05cf6a355.pdfIn PDF document text
    • http://fanuvowebutil.22web.org/66249619737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481424/normal_604a2756501fc.pdfIn PDF document text
    • http://repair-planshetov.ru/72158910781oacib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401983/normal_6045e1266f4fe.pdfIn PDF document text
    • http://fulesiv.22web.org/97791699125.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465269/normal_5ff2dcb4547ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374857/normal_5ff2140170379.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452395/normal_600964381c7d7.pdfIn PDF document text
    • http://newberginvestmentproperty.com/biblia_dios_habla_hoy_gratis_para_descargar6jyd0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_32fdada366784af49d64ffc47d92bfec.pdf?index=trueIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_2b72cc8c8cad4be190aa8c07c6f7de38.pdf?index=trueIn PDF document text
    • http://bulagim.epizy.com/26081557980.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/chiari_malformation_ct.pdfIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_819371c73f5144c3b328cbd547d6b63e.pdf?index=trueIn PDF document text
    • http://zukuwegafedes.epizy.com/pazukawididegunapelife.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/16176968219.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/zexilepalugewiwi.pdfIn PDF document text
    • http://tejizikadojuni.epizy.com/black_hole_information_and_thermodynamics.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_off0000f376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF376 5552 bytes
SHA-256: 1486bae4d2090d0f3b8fe3a1cd7d4820a91849b34ec7d356daacf29b67cf5e03
font_01_sfnt_off00010675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10675 11056 bytes
SHA-256: 267fd2207b271577c181ce503d80a5a97e86e6516d95392ab743b082e8c1c1a1
font_02_sfnt_off00012c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6B 12692 bytes
SHA-256: 239af0eb28927a06e46943cd438c91b1155a500924439aa16cc97246e85b3cb3

Open this report in the interactive analyzer, or submit your own file for analysis.