Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5f64b29cbb729a…

MALICIOUS

PDF

84.8 KB Created: 2021-03-19 04:02:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a67ce2c3e4f37ba69290c6d6b9f28831 SHA-1: 0889aaf67dfa45e09d477d2a5ef0f64cf631a9c5 SHA-256: fd5f64b29cbb729a6a0d3c137cf0875fce40ddfcdabbb4b33dcfaf1fb2d745e7
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with one prominent URL pointing to 'pelibifir.ru'. The presence of many links on disposable hosting suggests a phishing or malware distribution scheme. No scripts were extracted, but the structure strongly implies redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/strik?utm_term=css+tutorial+freecodecamp PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456676/normal_60490b809c4a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_600d571d740bc.pdfIn PDF document text
    • https://rogubofiduga.weebly.com/uploads/1/3/1/0/131069879/vixemakezefano-mijirafuka-pomifazojixo-jaxefunab.pdfIn PDF document text
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/mumeto.pdfIn PDF document text
    • https://durabikat.weebly.com/uploads/1/3/4/5/134512276/xupurebe.pdfIn PDF document text
    • http://koxoteripuxafo.iblogger.org/what_are_the_3_types_of_heat_transfer_what_is_an_example_of_each.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_602f3e2218b75.pdfIn PDF document text
    • http://foluxokifoni.22web.org/goxopufoz.pdfIn PDF document text
    • https://dufofumiwiz.weebly.com/uploads/1/3/5/3/135309849/9111315.pdfIn PDF document text
    • https://jafobepajimo.weebly.com/uploads/1/3/4/8/134881918/fakepojaviretik.pdfIn PDF document text
    • http://bedusopuzal.22web.org/61475607481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469626/normal_6031033e39321.pdfIn PDF document text
    • https://devegiwosoti.weebly.com/uploads/1/3/4/5/134592662/zedavedonejosaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_6043ecaf3b6a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377679/normal_60028a28cddca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465270/normal_5fd13d49f40c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_954d674230b54ce9abe106f0e762de00.pdf?index=trueIn PDF document text
    • http://zebofazedixa.rf.gd/legatexiluropem.pdfIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_5ce65f42feb54e14a50f3affc32e782e.pdf?index=trueIn 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_off00010bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD2 5208 bytes
SHA-256: 09763004637c9ae8d69c6fe95b01a7b3acad969c1b84846283d34538c5e7be8f
font_01_sfnt_off00011d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D71 11540 bytes
SHA-256: 8ac98ac9f4164e0f189d678b19ab5765a4825d1850386800e363ceda99bd3637

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