Malicious PDF — malware analysis report

Static analysis result for SHA-256 99cea2f4f2819f1b…

MALICIOUS

PDF

78.2 KB Created: 2021-03-14 05:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bf6f048189e1b21847731b221236c476 SHA-1: afa92c6672f8d4a8664f6a421c23f10cad4f8f0a SHA-256: 99cea2f4f2819f1b8e3309cf0aa9705f5d38899d81a0d6f8e0144b34ef20f2dd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or phishing attempt, with one prominent URL being 'https://mezovuduw.ru/wix?keyword=android+tv+guide+app'. The PDF structure and embedded links are consistent with phishing or SEO poisoning tactics designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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/wix?keyword=android+tv+guide+app PDF link annotation
    • http://greatmasters.biz/what_are_acceptable_forms_of_identificationfec85.pdfIn PDF document text
    • http://babysampler.com/nipunonobewawenopogob0ay9p.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirurafixi/gjb5hhi/traffic_crash_reconstruction_book.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/hi8iejg/reperixudipeledi.pdfIn PDF document text
    • http://teachost.com/how_to_use_graphing_calculator_ti-84_plus_cejhdd4.pdfIn PDF document text
    • https://cdn.sqhk.co/gutifusuf/hdicqCJ/download_zombie_age_3_uptodown.pdfIn PDF document text
    • http://nicepics.xyz/bafavopabapuwhr6bz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gelotamarabi.epizy.com/autismo_diagnostico.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/filtration_method_of_sterilization.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/gumming_sheet_a4.pdfIn PDF document text
    • https://a04ad255-06d6-4b17-97e7-91173d300295.filesusr.com/ugd/6864df_84f0d4159ad4488c825db3ae1688e4e3.pdf?index=trueIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_cc5a068681344f9491030b1d62907ef3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2bbd0d8-2f16-47de-ab6a-ebd612bc18cf/nanda_nursing_diagnosis_format.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/reflexive_pronoun_worksheet_4th_grade.pdfIn PDF document text
    • http://fifusudevop.rf.gd/adidas_performance_pureboost_go_ltd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd347705-9f53-4159-99bd-1ca78a2e60c9/vw_mk6_gti_transmission_fluid_change.pdfIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_81d0fb47e87f435f801c142172dd8789.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/piano_chords_apk.pdfIn PDF document text
    • https://18d8f76e-0bdd-4b96-b744-fee987eed1b0.filesusr.com/ugd/1486c8_d43ba2d875ec4231b021438b60f6f031.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/fezafubak.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40F 4848 bytes
SHA-256: bd0e96fa6c4c68fda7080b07a893d7af2402d608e006ddc1827ccc33fafd6bfa
font_01_sfnt_off0000f49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49D 12012 bytes
SHA-256: 93d6c3485ea6923ca4b8ff72f5ae9a06dd3df136f1c5b3087b6097292473951d
font_02_sfnt_off00011d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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