Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c36514db25523c…

MALICIOUS

PDF

79.3 KB Created: 2021-03-28 21:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a3019e823390f9a2b921476591e95b2d SHA-1: 919594ca59515c4ed67c1b710044aacad34a98e5 SHA-256: 12c36514db25523c56bad2d84ad7c23163d61a093df0f6754c0df81b924fe6e0
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://dugedepap.ru/award?keyword=austria+rail+map+pdf PDF link annotation
    • http://govovimifakine.mywebcommunity.org/area_of_circle_by_integration.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450046/normal_5fcdf44a1448b.pdfIn PDF document text
    • http://cyberlife.store/robot_walking_sound_effect_freec3fa0.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/2bddfcdee8c2f.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/how_much_is_david_attenborough_worth_uk.pdfIn PDF document text
    • http://kugaraginoja.mypressonline.com/a_traves_del_espejo_lewis_carroll.pdfIn PDF document text
    • https://wagetuve.weebly.com/uploads/1/3/5/3/135323282/pazobare.pdfIn PDF document text
    • https://wimunalowuzew.weebly.com/uploads/1/3/4/3/134360992/6206308.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/9529580485c3sjd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_605ad186f2697.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e1d1cd-5ae9-4c86-962a-aca08b5252af/97924986484.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/uidai_aadhar_correction_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7fcaae1-83ef-49e2-9d8c-3aedbf70305b/xusowipatoxezenuvuteg.pdfIn PDF document text
    • http://titugol.atwebpages.com/ketogenic_diet_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/alita_battle_angel_movie_tamil_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/585e8030-f496-4b66-9dd8-d77ca99d9e6c/41777456283.pdfIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/movie_maker_free_download_no_trial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5fa98e-6382-4cb6-9c4c-e5c58c3e235c/washington_football_team_logo_helmet.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_off0000ddaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAA 5176 bytes
SHA-256: 4934eedd2bc2ad68e004f75ea778fb6281bc57aa0ff914e0f9b8f6c329f9eee1
font_01_sfnt_off0000ef2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2F 12588 bytes
SHA-256: 92ab98a49f92d2ceca5dc3a1f925dd6f919a3b78dac924b849b1013af5036e9b
font_02_sfnt_off00011990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11990 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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