Malicious PDF — malware analysis report

Static analysis result for SHA-256 36baff3c65fdd6b8…

MALICIOUS

PDF

77.4 KB Created: 2021-03-08 11:35:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: acf4d84e087711bb4b7064f4e2d9b3e4 SHA-1: 3bb765ec5e72e68b757b6d9624aaab64bf6c9c02 SHA-256: 36baff3c65fdd6b89bdd2a9b1a4e6b1f167d0440f3e4712488b215b877c18a12
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 0.9991

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://crophysi.ru/strik?utm_term=linea+del+tiempo+sobre+las+edades+de+la+historia PDF link annotation
    • https://vilekelapufixev.weebly.com/uploads/1/3/4/5/134508089/39a77dfda61c7.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/xuxibupigagedagifuziwun.pdfIn PDF document text
    • http://tedurelaseji.mygamesonline.org/what_were_the_3_estates_in_the_french_revolution.pdfIn PDF document text
    • http://benomudefosopux.iblogger.org/88209290441.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/94485118748.pdfIn PDF document text
    • http://xukosususif.medianewsonline.com/how_to_set_time_on_casio_protrek_prg_300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_6034f64fc31ac.pdfIn PDF document text
    • https://limuvowefegepud.weebly.com/uploads/1/3/4/5/134509231/widigapusomajakixope.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402507/normal_6016a5ceab6a3.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/how_to_reset_disabled_iphone_without_computer.pdfIn PDF document text
    • https://bekazavaf.weebly.com/uploads/1/3/5/3/135327011/8482026.pdfIn PDF document text
    • http://naxiramomamaz.66ghz.com/28221836734.pdfIn PDF document text
    • https://kelutatu.weebly.com/uploads/1/3/4/5/134521402/1815469.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/how_to_repair_a_snowblower_carburetor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459621/normal_600dd06cccf7b.pdfIn PDF document text
    • http://raxojomaman.iblogger.org/bomberman_fantasy_race_pc_free.pdfIn PDF document text
    • http://zodimasar.mypressonline.com/58008670432.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/18524470386.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/36243065704.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/telezugabelasokotesuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xafuvarajuxeg.epizy.com/kingdom_of_the_wicked_kerri.pdfIn PDF document text
    • http://vofimefokugof.epizy.com/embed_images_in_google_sheets.pdfIn PDF document text
    • http://romakilax.myartsonline.com/ledozagidubawerisuj.pdfIn PDF document text
    • http://xekabotiwuker.atwebpages.com/que_significa_titulo_rebuilt_salvage.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_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 5280 bytes
SHA-256: 0caa7cc22982d1bf182c9ba45295c4874f41027781e0732f77ab8a40801158d8
font_01_sfnt_off00010024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10024 11624 bytes
SHA-256: 01d9fa0f203638bed01a7d575316167774af58cdcf0db996f1336f741b788979

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