Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75c713829350e3e…

MALICIOUS

PDF

76.3 KB Created: 2021-03-15 12:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 07f05d73ebcc1dabc23ba82e49757aeb SHA-1: 9585218a8202798cc911571e9b0006c8df856a0f SHA-256: b75c713829350e3eae68ada137c8870a9c86a8571093b4a5e3233ff9882edac7
126 Risk Score

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 0.9991

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://vilenefex.ru/award?keyword=alternation+of+generation+pdf PDF link annotation
    • https://cdn.sqhk.co/sesijisova/hfhaAgj/my_talking_tom_2_application_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kosadara/jcp8gjb/rc_truck_race_videos.pdfIn PDF document text
    • http://didazema.mypressonline.com/does_costco_have_car_seats_in_store.pdfIn PDF document text
    • http://uniques.space/eye_of_the_beholder_dd_5ej2tom.pdfIn PDF document text
    • http://ashotik.space/fefegigigqh6wk.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/where_can_i_watch_free_willy_2_online_for_free.pdfIn PDF document text
    • http://trokot-shopnew.online/wavuliruxogeribobosb18yi.pdfIn PDF document text
    • https://cdn.sqhk.co/kovajivika/FF0id0O/refrigerated_breast_milk_guidelines.pdfIn PDF document text
    • http://vitrinachel.ru/burris_eliminator_iii_4-16x50_laser_scope_cable_switchm9tmn.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/calcutta_university_registration_form.pdfIn PDF document text
    • http://boevoenlp.com/pojonakafewaxijuk038y8.pdfIn PDF document text
    • http://3gusevshop.space/nipuxufixebidflj1u.pdfIn PDF document text
    • http://xejapuz.getenjoyment.net/piwiwufanemosotigov.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/jj7ZPjh/jan_2021_pongal_date.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mepizegavipin.rf.gd/fevalokurokeberizuzox.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/jopabemefilum.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/sasopopozulaf.pdfIn PDF document text
    • http://semisel.rf.gd/79676730109.pdfIn PDF document text
    • http://wedemato.rf.gd/superguia_enem_atualidades_2020.pdfIn PDF document text
    • http://xemunebo.atwebpages.com/tuvipifisot.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/committee_member_invitation_template.pdfIn PDF document text
    • http://vitorozakosi.rf.gd/entrepreneurial_activity.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/dupukewitumolidebo.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/sanivinadawupivuxus.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 5020 bytes
SHA-256: f5b5e592b874c454c8ffbf85ff8b195b65e1fdbdfc4b231957dc8ceb724cf202
font_01_sfnt_off000100d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D6 10212 bytes
SHA-256: 06bb42bc0893e2a303c4c6dc303578a59520bb05b0d48d6fb6050454f99e6a0a

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