Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b7d702b3b45aea…

MALICIOUS

PDF

107.2 KB Created: 2021-09-01 18:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1ea819ec1771c7576d28a99ac2581776 SHA-1: 105ceec44c5913fd606bcf8e9bbbfcc76beba150 SHA-256: d2b7d702b3b45aead4e4872dd02a7167f2001b95605e8700541f52d4802c9333
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to various URLs, including one hosted on compromised WordPress upload storage, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of numerous external links indicates a high likelihood of directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bet-balance.com/userfiles/file/96742008833.pdf In PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/2hc984bb8euessuq1fi5cpriu6/6833253524.pdfIn PDF document text
    • http://www.hkimm.hk/_bin/ckfinder/userfiles/files/91370170615.pdfIn PDF document text
    • https://serka.com/serka/upload/files/zosenulupozazikisub.pdfIn PDF document text
    • https://aep-tc.com/cache/fck_files/file/monefupuvaxaxilep.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/48906666969.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/62333021374.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/9b9f736855974ab6d0b5e24fe5814bc8/32007666514.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/72941371558.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/85471976813.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/44097095765.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/4n8im8mjhnet97k6o77tffmoe1/pezipogiketenot.pdfIn PDF document text
    • https://mszukam.pl/dat//file/5286879986.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608f16fd683f8---nubalomifegozegalun.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/sojofitajuxawoga.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc3d7ab08f7---55168313529.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/83909994609.pdfIn PDF document text
    • http://moneymaker-gold.de/files/73839647187.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/15535033577.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/pexemise.pdfIn PDF document text
    • http://lawngo.net/fckfiles/xomiriwopepifisiwu.pdfIn PDF document text
    • https://silverstonedevelopments.com/ckfinder/userfiles/files/rasajubegidogamop.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/29b43b7455c17ecad54c0020da5cc3ad/tofepofevazawubavofusowav.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/78060406937.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=intake+and+output+practice+worksheetsPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C72 18776 bytes
SHA-256: ea0af1b7af02746765bc51b9635353b5951beac9e94643fff09aaa805bebbe8c
font_01_sfnt_off00016d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18541 10796 bytes
SHA-256: 2633e7dac4d22b2b5b7323faa9b7b7bd5538c1b8f5c03f6125eed00223173526

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