Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e911c3236179e9…

MALICIOUS

PDF

79.6 KB Created: 2021-05-13 22:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0b79d03495b6be035ef62dac500d80c2 SHA-1: 24104f78047d3066b5486c1d1e1776b01c6c3101 SHA-256: f2e911c3236179e9a81901ea519d429351b46264f4e39b687b1afd82bd1a9f96
186 Risk Score

Malware Insights

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

This PDF document 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 shipping costs, likely a lure to direct users to malicious URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/strik?utm_term=how+much+does+it+cost+to+send+international+letter PDF link annotation
    • https://cdn.sqhk.co/vadetegubufo/ZijhcyO/kanto_pokemon_shiny_list.pdfIn PDF document text
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/nolugup.pdfIn PDF document text
    • https://wosabawa.weebly.com/uploads/1/3/5/3/135390578/pidifobe-rivasijagage-defifoj.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/zopaxowolodafum.pdfIn PDF document text
    • https://dokejene.weebly.com/uploads/1/3/4/7/134710839/5990067.pdfIn PDF document text
    • http://wubujogulekaf.iblogger.org/pogarafavok.pdfIn PDF document text
    • https://kutisujazuj.weebly.com/uploads/1/3/4/6/134625744/3712993.pdfIn PDF document text
    • https://xozilawowoxov.weebly.com/uploads/1/3/4/7/134704750/8341738.pdfIn PDF document text
    • https://cdn.sqhk.co/mofipife/thfhhjc/goribaririjisa.pdfIn PDF document text
    • http://vabapagamowese.22web.org/52701973600.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xurosuforudev.atwebpages.com/avon_brochure_march_2020_download.pdfIn PDF document text
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_d1ddbc05143c439da1b38d905431b4a6.pdf?index=trueIn PDF document text
    • https://801a9f91-e12c-4b3a-b535-42c3eaff61c8.filesusr.com/ugd/d237ef_d424486f98d44991a56ee4f769341b5d.pdf?index=trueIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_2121b43bf0634c779dd3ec44f25bded5.pdf?index=trueIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_458f4903293244129847b938e067314f.pdf?index=trueIn PDF document text
    • http://girofili.myartsonline.com/gegomibizukunonovazufaz.pdfIn PDF document text
    • http://pokuzanu.epizy.com/learned_helplessness_theory_and_evidence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a80852c5-e263-4bd7-8b14-a57d8bc43db8/deziwatuliraberebik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a47c55-3b98-4176-98e8-986ff53f6635/47530744472.pdfIn PDF document text
    • http://rodaselawowov.rf.gd/72760323855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3566c726-80bf-4653-9eaa-f4f8301bd681/samsung_ipolis_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd56d69b-5264-4ec7-a6b9-43978bdaff67/which_catholic_bible_is_most_accurate.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_ae84227989fd418d8a728436c45a2151.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b357ce-cd33-433a-924f-c3633721cd8a/tavifamikibometakez.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_off0000fafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFC 5232 bytes
SHA-256: 336cace24688c02d9d20dc9db1494b640a6ca057f21be07866e235a2c1b22226
font_01_sfnt_off00010ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA8 10464 bytes
SHA-256: 94841b892e8252bfc270f46508122ab41ab20c51d57d1167c1817c75778654fc