Malicious PDF — malware analysis report

Static analysis result for SHA-256 70263b562948810d…

MALICIOUS

PDF

78.8 KB Created: 2021-06-02 03:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5b25548fdb73046f6fa8101e365fbcdb SHA-1: f88b3e64ffa82afd93be8c176b4ae007c9387738 SHA-256: 70263b562948810d970db5f5e6ac4dd7c5f316ad5e7dfcd96e279a5e22be2126
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, with one prominent URL pointing to 'infrive.ru', suggesting a phishing or malicious content distribution attempt. The PDF's structure and the presence of many links indicate it functions as a link farm, likely to manipulate search engine results or redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://infrive.ru/pbw?utm_term=how+to+make+cows+gain+weight PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419218/normal_60395386c9ec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_604f31c8ac10d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403129/normal_604355baa4ca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_602f0a09687d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449775/normal_5fede7890fbed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403565/normal_604bbf8b1cd3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414689/normal_6050ff8251c23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://funuvutidip.pbworks.com/w/file/fetch/144457959/simodowujusaturugeke.pdfIn PDF document text
    • http://mepijewaj.pbworks.com/f/sirisuwip.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/w/file/fetch/144428469/rockshox_monarch_plus_rc3_setup.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/f/what_race_is_ahsoka_in_star_wars.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144411966/78131834261.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/f/manrose_26867_extractor_fan_instructions.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144427386/fijinemavivejajanarenimoj.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/w/file/fetch/144433263/21482952525.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/w/file/fetch/144426942/59937605181.pdfIn PDF document text
    • http://sonopewobu.pbworks.com/f/34364482664.pdfIn PDF document text
    • http://mibegenav.pbworks.com/w/file/fetch/144441591/54258958607.pdfIn PDF document text
    • http://katafuzum.pbworks.com/w/file/fetch/144483999/wwe_2k14_download_ppsspp_gold.pdfIn PDF document text
    • http://zeladejan.pbworks.com/w/file/fetch/144442449/download_twilight_sub_indo_full_movie_2.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_off0000f73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73D 5204 bytes
SHA-256: 685e1e9d1a4dcd16e700ee95c260848540d39e0140ce4a1b375b395b003797cb
font_01_sfnt_off000108da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DA 10740 bytes
SHA-256: c961f24c7935c7a5b0e414aabb9f2c0ad7fd8cfad95c313748205f0a6ae4bedc

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