Malicious PDF — malware analysis report

Static analysis result for SHA-256 13ad9eaaefc2ae41…

MALICIOUS

PDF

138.8 KB Created: 2021-07-06 17:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 93255c41ffab32dd5f0d49a80820ff00 SHA-1: 28278fe8b85b8ff823edfe7c0269a353a032e3a1 SHA-256: 13ad9eaaefc2ae416d18ee0973ff01d20b9b751d52289e7a3911d7c9bdcf17b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malicious content delivery attempt. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting, likely to distribute malware or facilitate phishing. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://feuerwehr-mittenwalde.de/mediathek/files/65359887909.pdf In PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff0afb2d84---jawuxomapukig.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/hpn58lulf8fj9gihf7qo8motfa/zukanosegufekabofuvi.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/fisuwunulebalefopij.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/turupuvurowifotiripekipa.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/409307540a33c5216b96e9e514ae6246/14635743010.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/fisudofuweti.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b43f9eb211c---75912119998.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160bad9fc9a611---vuzubo.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c84c0b831e---kodedakefalaniz.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/sla92jcjspptkgduhjj3lijgfp/sisipiwalivofagakus.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160850dec32ec1---95743878382.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/82461812887.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/5aa077b26851523b61ef43d2c77b53c2/74463212915.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6ab8d146d---suwideporesagurafideto.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/7kd8gpl70jeu637h85q73pbom2/44795107121.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/e35566341bd5a4de168fc07913a35387/sakav.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/3b8e8b1660e88297ae3b61df81996c11/podusesoluremages.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160936bb50916e---60453594311.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16097373ddede3---43801268648.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/32840791356.pdfIn PDF document text
    • http://cityhigh78.com/clients/2/2d/2ddbae4fb74c169819b3574d76e4e264/File/77367487634.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=moon+in+12th+house+death+of+motherPDF 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_off0001beb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEB1 16964 bytes
SHA-256: a6bd5ea6e41410eff7b454014386a7864e1a2521a7c442d2c5b18baf49dd9442
font_01_sfnt_off0001eaa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EAA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000202bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x202BD 10840 bytes
SHA-256: b99d64e3323763a7a58ed9ac2ab9db7cd03f3d07c6c6d89890d5cef029b06b11

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