Malicious PDF — malware analysis report

Static analysis result for SHA-256 4857abc273ffbf81…

MALICIOUS

PDF

76.5 KB Created: 2021-03-04 15:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 39ff0b826fadd6f12f7fd27f3b0f236e SHA-1: 287f4e1b32f19d5e480509f648188eb5ab0714db SHA-256: 4857abc273ffbf816dfe0f6b4a45857b80d37c77860eb4e9c4094cca4784dbf4
156 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'pokemon ruby apk file' and directs users to a suspicious URL, xezojetit.ru. Heuristics indicate a large number of external links, suggesting a link farm or SEO abuse tactic. ClamAV detection and ML classification confirm maliciousness, likely related to phishing or malware distribution.

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://xezojetit.ru/wix?keyword=pokemon+ruby+apk+file PDF link annotation
    • https://rimuzomidaz.weebly.com/uploads/1/3/4/3/134353295/bofisopivupelex.pdfIn PDF document text
    • https://webuxeneme.weebly.com/uploads/1/3/4/3/134368634/8590876.pdfIn PDF document text
    • https://rewusimivizegan.weebly.com/uploads/1/3/4/5/134578415/vejemodinipijezeke.pdfIn PDF document text
    • https://gedenotovet.weebly.com/uploads/1/3/1/3/131379555/xaxim.pdfIn PDF document text
    • https://xibupofuku.weebly.com/uploads/1/3/5/3/135306475/wosuba_zotep_fivikasubebu_fujup.pdfIn PDF document text
    • https://ximavubakalik.weebly.com/uploads/1/3/0/7/130776508/nexofuz-fuzejiwejivavuk-jipem-zizinapodo.pdfIn PDF document text
    • https://zolegezuboz.weebly.com/uploads/1/3/4/4/134462972/1152564.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuxexi/fusiwomibiwirer.pdfIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_57e321c9eda844a48bc24899595edf8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/801e6fbc-0193-458f-ae41-d490359ac967/59897138436.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/maplestory_m_guide_cygnus_knights.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_71fcee832a0b44b6ba3430e8088c3136.pdf?index=trueIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_4de29b9a5d7f46058dede97874f272de.pdf?index=trueIn PDF document text
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_6d135a97e1f943b69e9207e550460dbe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/nextkast_internet_radio_automation_software.pdfIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_96bfb0cc82304840979533f1a8c1fbad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/string_format_javascript_currency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e33d20c0-e36e-4a0e-8438-2575714d3231/dodge_avenger_rt_2013_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/wikuvewasivibaviwofasari.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_off0000dae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE2 5176 bytes
SHA-256: 041886e3cc90b95af55079fa2947b49cadb4dcd1dfd687111138ea7dbeb6615f
font_01_sfnt_off0000ec6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6B 3024 bytes
SHA-256: f271277bc92c8ec255f016eb89af31946ace6cee13b85d2ca72bafc089855a25
font_02_sfnt_off0000f79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79F 14372 bytes
SHA-256: adcc649b14a6811c80f3899db3158d24ed2f8813eca69e1e30adaebe5e58475b

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