Malicious PDF — malware analysis report

Static analysis result for SHA-256 abcbadda52cc4f5b…

MALICIOUS

PDF

81.6 KB Created: 2021-09-10 03:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a5bb38cec93650a6bad047cc7b7b43c3 SHA-1: 12aa0653ca2aec283ba8cc822fb78b6360eb0608 SHA-256: abcbadda52cc4f5b7fe4852e01b3c819657aa52043495e7c88132f56a913c567
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics and an ML classifier. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or redirection scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the PDF structure and URL patterns indicate an attempt to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://thegioioto.store/upload/files/palixajalorekiwolum.pdf In PDF document text
    • https://havadisname.com/upload/ckfinder/files/nosadixejine.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/wosisakefifavapetuzalo.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/ritakazomufopavulabixedub.pdfIn PDF document text
    • https://zlato-stribro-investice.com/upload/files/tinesafurosagolu.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/91982779876.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/23138192887.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/vetinabixidadi.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/93462208.pdfIn PDF document text
    • http://haihengpharm.com/upload/files/gufuzesobewosirobo.pdfIn PDF document text
    • https://biocoils.com/img/file/7613809804.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/ferogifomor.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/rimatitumajukajiwemonose.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/kizopiguxuxep.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/93341560608.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/38067257811.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/xajetirinofotufofabalos.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/revegitidolibulexaj.pdfIn PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/35676837973.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7791b91d9---77331901856.pdfIn PDF document text
    • http://dongphat.net/upload/files/68240482336.pdfIn PDF document text
    • http://cartopack.be/Images/file/30218423033.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=outlook+calendar+iphone+not+syncingPDF link annotation
    • 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://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_off0000d725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD725 18280 bytes
SHA-256: ee766e8c7901b1e248273301f6bd0fe28fbe957322ad318b97b8a12c9fcda84a
font_01_sfnt_off000106cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CC 11124 bytes
SHA-256: f7e47c3cbfa7e1fcc847b70e5b2964ddb0e9eb1b89166e9de189da143358d35d
font_02_sfnt_off0001208f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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