Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6f9063f8e92fd1…

MALICIOUS

PDF

86.7 KB Created: 2021-07-04 06:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8adb3293aa53d434ae8110dc83735b1b SHA-1: 84512fe621c4769e8ee5fba9ef27390e8ccc45c2 SHA-256: df6f9063f8e92fd1e9bf1b1f1109d653ffb7a79274951b2a52274956b308cc6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, presenting numerous URLs that point to other PDF files hosted on compromised WordPress sites or disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/1f2dd684a38996657677f0c799932dc5/fixisat.pdf In PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/1g93aismdjbv4j916dn820ap81/dejude.pdfIn PDF document text
    • https://adreshosting.com/calisma2/files/uploads/penifirazetamevewilam.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/54900218546.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/03ec9fab3bc314f8d810fc0fefb139d1/wupunoraxivununej.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1620867764.pdfIn PDF document text
    • http://xinyuemu.net/assets/202106/files/20210627161418138033.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/45834112168.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b3d3574d3---pofaxituzodewolik.pdfIn PDF document text
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/89675933295.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/c0d9cd8e3cf1ad5720b479550c8777bf/xinaxoxovixuninegigu.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075f8888f5e4---78882666529.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/bapigetijev.pdfIn PDF document text
    • http://rubensova16.cz/files/file/tixamitosavubo.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736bb52e362---56274182503.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607304c6dad09---9600081126.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/00acf7646e95c0581c772f16144e32e7/48427076154.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b7d243f5c---10999759664.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/40817369592.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba72a752ae2---60869052417.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/sewopunibeji.pdfIn PDF document text
    • http://groupkaishan.com/d/files/52592904015.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be652890912---jukaxeja.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/255fdd33dd081becfbaf9bce28060cb2/89691777285.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=periodic+table+trends+answer+keyPDF 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_off0000eeb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB7 16936 bytes
SHA-256: a37e233d28ca0b071d3f283bbdbb6e23e9f1b905fa2fcedb3b3f02b3861a05cd
font_01_sfnt_off00011aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEE 10796 bytes
SHA-256: 9ef8070c2692df0c401fc55c548ccb3abe1d6c0ec1765a14fb6eef00174fb947
font_02_sfnt_off00013401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13401 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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