Malicious PDF — malware analysis report

Static analysis result for SHA-256 648a8ad22b98025a…

MALICIOUS

PDF

82.5 KB Created: 2021-03-26 10:33:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 123f1ce314bb21ef7eaae756c4b98ffd SHA-1: 50c13aaba13911b64ddb8ad654b0d119abec1901 SHA-256: 648a8ad22b98025af64aed47655e3e3a566ff7f0ef5934ec06637b27385cf047
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 0.9998

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 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/wix?keyword=fallout+4+mod+load+order+guide+pc PDF link annotation
    • https://xoxekoxezugox.weebly.com/uploads/1/3/0/7/130738790/vuzekajumosuzu_lurubulumanak_mavawal.pdfIn PDF document text
    • http://kedamijofulufep.mygamesonline.org/expos_sur_l_amenagement_du_territoire_ivoirien.pdfIn PDF document text
    • https://cdn.sqhk.co/zenegiwowi/hh9ie5O/refatamutamamixiguji.pdfIn PDF document text
    • http://lowusonuraku.mygamesonline.org/mepezad.pdfIn PDF document text
    • http://jesibijifinuz.mywebcommunity.org/96380075099.pdfIn PDF document text
    • https://cdn.sqhk.co/lebapivi/Ivjavag/34594943100.pdfIn PDF document text
    • https://vajefusuvujob.weebly.com/uploads/1/3/4/4/134464162/rinuv-dukuzugomufosin-mebaki-velemuzimevuxew.pdfIn PDF document text
    • https://cdn.sqhk.co/zegareguw/hbOfhdp/noticias_telemundo_chicago_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/gd69Y4I/sepegebiwabotaboliden.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nivuzujanux.myartsonline.com/black_and_decker_all_in_one_breadmaker_recipes_without_powdered_milk.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/what_year_is_the_kindle_fire_hd_3rd_generation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d8823ba-4cf9-42b6-8535-f0303518d323/soleguwesavomibenolabefip.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/xavokakeganetu.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/training_and_development_plan_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81c39504-6c85-4d6c-ba97-b200e2a1916e/vojoja.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/free_tv_s_sites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f87cd340-f33f-4ce3-96f2-94c90c1041d9/lizatukamivowupev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3ea7bb-b534-4bea-b58d-fd7c8d5c4567/electrical_engineering_1st_semester_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb5f67e9-9f78-471c-b6cb-28adbd8c86b8/what_is_the_boy_scout_slogan.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_off000104bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BF 5256 bytes
SHA-256: 27a23118f0265c63dc1061e3df91bc5e602bbbc079f2cf4c5ad264a3557f128a
font_01_sfnt_off00011698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11698 11332 bytes
SHA-256: 3517faf70383627805bcdc0a6cfb2f89d6f32c654ea9b9a01904be06240edd7b

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