Malicious PDF — malware analysis report

Static analysis result for SHA-256 9979984787153317…

MALICIOUS

PDF

75.7 KB Created: 2021-02-19 15:27:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fbb8ab34f19a728dbff52c7e5e65a80a SHA-1: daee751e95f325d0ea5eddd9fe1ff13d28459fdf SHA-256: 9979984787153317b0e715377f541c3260151e7906a69da5e74841459f76dd92
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=1987+omc+cobra+service+manual+pdf PDF link annotation
    • http://jasapremium.xyz/34377887367iptx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376625/normal_5ff67ae910c59.pdfIn PDF document text
    • http://leadtop.co/citra_3ds_roms_pokemon_xtiaq7.pdfIn PDF document text
    • http://jukavoluv.iblogger.org/speak_softly_love_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/godajaxox/hgiIhco/lifajabupanudebitamubosef.pdfIn PDF document text
    • http://neojust.ru/39326572907kp0cw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417652/normal_5fdb5410a910b.pdfIn PDF document text
    • http://wurulef.22web.org/wekokinobopanomoxorede.pdfIn PDF document text
    • http://vinnipoh.space/android_sdk_location_osxse9wm.pdfIn PDF document text
    • https://nurinakeviwiket.weebly.com/uploads/1/3/1/4/131407921/ribofa-sepewepupupuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469638/normal_5fea21c9954d0.pdfIn PDF document text
    • https://pavadugubuwab.weebly.com/uploads/1/3/4/3/134309483/2956812.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ramasewo.epizy.com/music_without_vocals_audio.pdfIn PDF document text
    • http://poluxik.epizy.com/temperature_and_heat_energy_worksheet_answers.pdfIn PDF document text
    • http://xelefufod.rf.gd/watch_rosemarys_baby_1968_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/mssql_cheat_sheet_sql_injection.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/50139688145.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/lalebibakisisojakevetol.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43F 5888 bytes
SHA-256: 057e25fca45126349bd7693748cc665734e4bc20fa5381e92f81d176e2ab88db
font_01_sfnt_off0000e83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83C 10520 bytes
SHA-256: fcf956f13e4c374c7211c5dce9ff958f7215bac6d68795a5fae9cea86aa88dbd
font_02_sfnt_off00010c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C84 16096 bytes
SHA-256: 12a626831db0ab1a5f4f18db45a8b3a2d0cd9a325dacbfc8ffaeb81ab057ab2f

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