Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e1105b4d6a1e11…

MALICIOUS

PDF

77.4 KB Created: 2021-04-13 19:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 65a4664c30724ea2e8052f091f5953a9 SHA-1: 08f7c7af5e0309fa2a456ee686efc1c88d2f4b77 SHA-256: 75e1105b4d6a1e11f4eb3940587746e6fb070a98dba34f5dc6110d9c67e94bcf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://mezovuduw.ru/strik?utm_term=aeschylus+oresteia+shmoop PDF link annotation
    • http://rowajenuw.iblogger.org/nouns_verbs_adjectives_and_adverbs.pdfIn PDF document text
    • http://zogixobanifowi.22web.org/4624980195.pdfIn PDF document text
    • https://nobenore.weebly.com/uploads/1/3/2/6/132696051/4607069.pdfIn PDF document text
    • https://saxepuxuk.weebly.com/uploads/1/3/4/4/134472003/jamenimutawedu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365627/normal_6006a2d9b2eaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464996/normal_5fdffcca2dd2d.pdfIn PDF document text
    • https://xaluromaw.weebly.com/uploads/1/3/4/8/134862284/nagolobixilaz_tajipup_konokexiki_toxateseralapij.pdfIn PDF document text
    • https://widuboxizivibib.weebly.com/uploads/1/3/4/3/134315701/963da676efdc.pdfIn PDF document text
    • http://xuzotudaraderuf.mypressonline.com/debate_formats.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/weight_loss_diet_menu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449775/normal_5fed19303a3ff.pdfIn PDF document text
    • https://davokirik.weebly.com/uploads/1/3/0/7/130739121/4468762.pdfIn PDF document text
    • http://zowifupure.iblogger.org/pelusuxa.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/132b5ee2-ad3e-4857-977a-a8e575959ae1/safe_haven_security_salary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3895c060-5337-4fac-9f82-8917425d6b62/kifotisejomakape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b0ad542-03c9-4c3f-8c39-116f5507959f/69264494690.pdfIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_9a2283bc70e747478166a57e65f68f68.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b9fd89-437d-463c-8291-e3ebd6492062/what_is_the_best_coffee_maker_with_built_in_grinder.pdfIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_5c524ed5bf804fc184979a43f82aceb1.pdf?index=trueIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_081ae5b1dd484d499bc963cff38facc6.pdf?index=trueIn PDF document text
    • http://rumakepalo.rf.gd/concepts_and_applications_of_finite_element_analysis_4th_edition_solution_manual.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_off0000e901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE901 5264 bytes
SHA-256: 9724979e5f07cbc8827ad84f20a94ab9968d8f32e9bf0f648e38305f644c09cd
font_01_sfnt_off0000fac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC6 13872 bytes
SHA-256: 2feac5417c47508f5497ac6541bb5dc218bbfd7e64427ead14647a1976b1a0c3

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