Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a955d1cdbd96d4d…

MALICIOUS

PDF

104.6 KB Created: 2021-04-16 18:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f8f1116488d79acbffa45a605fa05e9b SHA-1: b04e6d9bb5ca1d2e3c659157598d3523d5664426 SHA-256: 9a955d1cdbd96d4d482e06ac6676dd738dc7df34a94f10fed9e7f33fc8e6fde3
156 Risk Score

Malware Insights

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

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 0.9987

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://ponafet.ru/strik?utm_term=roland+r8m+manual+pdf PDF link annotation
    • https://milarenu.weebly.com/uploads/1/3/2/8/132814898/4cf3e412.pdfIn PDF document text
    • http://all-system7.work/wulazegigozeboguwkgz9q.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/12d946f99d6f3af.pdfIn PDF document text
    • https://gixebodaloru.weebly.com/uploads/1/3/1/3/131379223/9321881.pdfIn PDF document text
    • http://electriccannoz.club/mufupukukalugawadukrqjlo.pdfIn PDF document text
    • http://azakalaza3.xyz/frackin_universe_storagera9bk.pdfIn PDF document text
    • https://rudadikisoma.weebly.com/uploads/1/3/1/6/131606677/2758222.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://xikisefux.epizy.com/why_is_my_samsung_smart_remote_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/62343406738.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/xixidomarafipitebov.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/9054859673.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/too_big_to_fail_online_castellano.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/campaign_finance_reform_bill.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/journal_of_bacteriology_citation_format.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/turedakuxutaw.pdfIn PDF document text
    • http://ruriwujuvuwa.epizy.com/arcgis_cogo_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/helter_skelter_movie_2012_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/uwc_scholarship_application_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/88966458181.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/primary_and_secondary_sources_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/ap_sachivalayam_jobs_notification_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/sudesutixifitapiwamexe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001392c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1392C 4848 bytes
SHA-256: e6b0d6371ace099238fcf80b424640fa9fb8d8e80cecbffe80fd96400291f2c9
font_01_sfnt_off0001497d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1497D 11128 bytes
SHA-256: 7dfa9fd883009d55c9d7e48268b669162ce77e32ebdcce1740e8547d5ba96654
font_02_sfnt_off00016f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F90 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_03_sfnt_off000184c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184C0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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