Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2471bf0b069a697…

MALICIOUS

PDF

77.3 KB Created: 2020-12-07 19:29:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 45fd8ce9716969196db9b946aa3b93c4 SHA-1: d9dc554927ec1c57baf10e5cea6cd9c0906672c5 SHA-256: f2471bf0b069a697db56bc59f22c72969922c5809fe68901204b5e91dfa6e5c5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to 'acbc exam answers', aligning with the heuristic findings of a lure for external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/strik?utm_term=acbc+exam+answers PDF link annotation
    • https://gakuzelidojipo.weebly.com/uploads/1/3/4/3/134395763/2266915.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/5699673.pdfIn PDF document text
    • https://toxoladosa.weebly.com/uploads/1/3/4/4/134479392/lesesora.pdfIn PDF document text
    • https://mozovarowojexi.weebly.com/uploads/1/3/4/8/134867055/ebd35300c95.pdfIn PDF document text
    • https://vemideluguzuni.weebly.com/uploads/1/3/4/6/134680431/ecc4ac.pdfIn PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/114da6836.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/a0bf6d5f-5489-42da-b77b-1bb66511cd74/17594801673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a7bb495-e8c2-4169-836c-ed375b5f58cf/wejurari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb3e512-2e65-4459-9215-5bafac03c9cb/1342706406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f20292b-44ef-4a61-8530-48e90452f781/94573754182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ba939e-1deb-401d-b332-f82a2922abd0/personal_report_of_intercultural_communication_apprehension_prica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb544854-93ce-4f9d-bb49-e5096b1b82a7/26066425353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a2cd738-4809-45e3-8689-a45916a3e2c9/89418857960.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/95857555636.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/estimated_tax_return_calculator_2020_irs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4113c0e1-0f55-4ed6-9799-3cf3a8081247/zegawure.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_off0000f1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E2 5204 bytes
SHA-256: 5da8962ea833053f9f4fc8a62fbd33855d53dc3c5a925ed24b60c9302ae14575
font_01_sfnt_off00010398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10398 11156 bytes
SHA-256: fbb64e2e4f1f38be347b0587e84e7dba3e85f0f05afeb28aa7648487803e868c

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