Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3b6ddac43f4cb2…

MALICIOUS

PDF

177.6 KB Created: 2021-06-28 14:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8c01b7db50e41186b50070e30f4ea416 SHA-1: 06d4da987b1eb2d270f3be3d95fa9c1fe4556806 SHA-256: 5a3b6ddac43f4cb28914a7e4146d659942c0b10d9047ed10a9985ad4744c7f0b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely contains instructions to decrypt a password-protected archive, a common tactic to evade security filters. The presence of numerous links to potentially compromised WordPress sites suggests a link farm used for hosting or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/2ef92d1cc78b024cabd8fc1a9bf4231b/ludifaridabut.pdf In PDF document text
    • https://bhsbeacon.com/FCKeditor/file/59077270039.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/6036667821.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/rezavipudozopawarigej.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/50300678308.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/50634302894.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/vodisusupefenozewazogun.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b2d96a9ac---zivukasanuwoke.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/312198938553fcf91678da10129d95cd/80510312042.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c683a19c1---77387330589.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/3bc7435345abdea16b078d9aaf3bd217/pimiresa.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/o161vqu3i8cssojfltliqpg0lb/97310523770.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/77925454841.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/0b8827e4b9796079475377d0298dd070/56481883262.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/soxewalawub.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/234689fcce9a228b032e20ff4c8a5b47/52291103624.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/21632580600.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/739312707ce7167723b6737e0cf47068/28184707716.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/fbh67jpet0uh6ve5rp37dpvmvo/dizerovotesemabotewufito.pdfIn PDF document text
    • https://bataretak.com/img/files/file/22982221588.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/5739toim30h58tdvm5ker2qbiq/mudedod.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/19941817527.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607db9df92002---15578116846.pdfIn PDF document text
    • http://ibb-online.ru/f/file/73732252455.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=shepley+l+ross+differential+equations+pdfPDF 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_off00023bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23BDE 29392 bytes
SHA-256: 60bc90a49cb7176b5d02251495636ab39c75c14be79acfee2a5ada2458391f69
font_01_sfnt_off0002873b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2873B 11028 bytes
SHA-256: 6798bb85be9b39268b108b71f339e38dab82a7278939549f9e3715e7ff9b96ee
font_02_sfnt_off0002a0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A0A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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