Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e434da842dd584d…

MALICIOUS

PDF

82.2 KB Created: 2021-03-30 15:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cb661b34fe2818b91592dd7d9303e362 SHA-1: 0e53d5197e2719c85d7f2c08432f5b19e129772b SHA-256: 3e434da842dd584d65c6096f39d378eef0ce1df8a758ff59280c59c4bf207373
126 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and a link farm heuristic suggests the primary goal is to redirect the user to a compromised or malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=what+is+covid+rapid+testing PDF link annotation
    • https://kidodizaramaba.weebly.com/uploads/1/3/4/0/134096495/judowoliwap-zutod-savedadizaxam-kuwuwijegewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5fdb59e4d10ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472213/normal_5fda7c9ecc781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481064/normal_60597816901b5.pdfIn PDF document text
    • http://wivejudotimog.22web.org/front_office_assistant_interview_questions_and_answers.pdfIn PDF document text
    • https://ropadapolope.weebly.com/uploads/1/3/0/9/130969983/de8ae0d09b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421767/normal_5fc67ee11daff.pdfIn PDF document text
    • https://jeluxipofike.weebly.com/uploads/1/3/4/4/134490416/nikemijejedesoz.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/45214441205.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5ff4330c883d9.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/causality_models_reasoning_and_inference_2nd_edition.pdfIn PDF document text
    • http://xexudoj.22web.org/adyashanti_true_meditation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kexomun.myartsonline.com/showtime_rotisserie_turkey_breast_cooking_times.pdfIn PDF document text
    • http://pedirite.onlinewebshop.net/83333574629.pdfIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_4e02483f34974547910ddeb2e5fa4c78.pdf?index=trueIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_d092fd0e94fa43d0b63c5425f8c79b24.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luborinizu/motorcycle_diaries_plot_summary.pdfIn PDF document text
    • http://juwinemuluwodis.epizy.com/the_breaker_anointing_barbara_yoder.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/blank_page_template_wordpress_plugin.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/xekazurafidijupib.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_off000101c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C2 5376 bytes
SHA-256: d17615657d5cca3c1539494afc1377509b1aa4855e1c73defd3bf09eef705f11
font_01_sfnt_off00011415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11415 11164 bytes
SHA-256: 8492b13763dbf967a5ec91a85f4e12800eb25829b1843c61cba086079dc37be1

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