Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43f1a94edb4e476…

MALICIOUS

PDF

79.9 KB Created: 2021-03-21 06:58:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1a56c1ae5b301f315217175b193ad892 SHA-1: e301852d96f57fc8b51a723e6f5dd584e8a16306 SHA-256: a43f1a94edb4e4764a50cff583231bc87c244f2aa070b279db7eb23f7c25b83e
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 0.9993

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://jottigo.ru/wix?keyword=dermalmd+under+eye+serum PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459777/normal_6053832f60296.pdfIn PDF document text
    • http://xevivaxipime.22web.org/playerunknown_s_battlegrounds_android_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/riroxale/Kcthdje/34141283717.pdfIn PDF document text
    • http://miwuzobi.sportsontheweb.net/candidiase_masculina.pdfIn PDF document text
    • https://bopojebokup.weebly.com/uploads/1/3/1/4/131408204/wepolubelig.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/how_are_guidance_discipline_and_punishment_similar.pdfIn PDF document text
    • https://serarabasujuz.weebly.com/uploads/1/3/1/6/131606617/jubazikag_diwazevita_beporujawix.pdfIn PDF document text
    • http://dowotezovemalo.mygamesonline.org/82275189111.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/CMicZqQ/fedumunefisilajevabuvogam.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/kinifaxejazipovasa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366645/normal_5fdd8721a6ef2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428062/normal_5ffed1dfa754e.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/h1jdhjv/jasigegazurekenizujazo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421341/normal_60016b672dcf9.pdfIn PDF document text
    • https://cdn.sqhk.co/jagajara/hdAgj0u/beirut_nantes_sheet_music.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/out_of_the_shadows_anne_marie_west.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464702/normal_60313f4fb6bd8.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/587476.pdfIn PDF document text
    • https://mudizuponiwox.weebly.com/uploads/1/3/2/7/132740987/31f198f6cc2159d.pdfIn PDF document text
    • https://tiwokixaxuvap.weebly.com/uploads/1/3/4/2/134235176/3887730.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kodireso.epizy.com/mathematics_zambian_syllabus.pdfIn PDF document text
    • http://bimitev.epizy.com/votasufedorevibise.pdfIn PDF document text
    • http://gusipeviriw.rf.gd/danabuzokag.pdfIn PDF document text
    • http://fudavifakafolid.rf.gd/annales_chimie_terminale_s.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/desasuteritijapivukitefe.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB63 5072 bytes
SHA-256: 5ede164f9adad1499ac6b716deaacf92693e7d49cc79e48968b5c0a9f4d1ace0
font_01_sfnt_off00010c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C91 11160 bytes
SHA-256: cd52c37a9d787f92cddf6037cbf357f26f8fb2d9e474f6aa1b48d28200a5ae59

Open this report in the interactive analyzer, or submit your own file for analysis.