Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ab468672e2e65f…

MALICIOUS

PDF

81.5 KB Created: 2021-09-02 21:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c66062b389f945d82d8cabcb51c44463 SHA-1: 74a199477f9abff2fb6bbd117fc5af373ac497de SHA-256: d7ab468672e2e65fc6589793b74baabb94f30ebe90c38b45c836ed652d1be4af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were extracted, the presence of numerous embedded URLs on potentially compromised sites indicates a strong intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/f909555671bd82f00896b22165d5f47c/penug.pdf In PDF document text
    • http://unsersohn.ch/images/file/nevewonabufuwawul.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/82724550252.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/63099576249.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210804135503.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/40836195920.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/den7kolglhosh5nhiqadaf4mef/refudalofore.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edc7676f9c7---xofolagevop.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/repuxemupubusasidudipe.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/25428042942.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073dafa638f2---dasefelinatajaxiver.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607717301fde9---30663264254.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/dufazetidorujaza.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606eeae002e2c---9786349270.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/5ef86a755a56749a39cb3484adc37c3d/96268185960.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6ba5979f6---57413578796.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607bc7efc48e9---gutateni.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/f5d0b2b212b2dfca06a808079b4c368d/lagevukek.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/t39vru60hmubpnhpvgiqpo8ou7/kitupipasaz.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/36275302362.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/93711558570.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/13908948722.pdfIn PDF document text
    • https://schmitz.cz/res/file/6523387304.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=types+of+antisocial+behavior+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD953 17728 bytes
SHA-256: ae512a6e20c15a15b56e126d5190ba11189e59d298c155d59826a26ee6c3464d
font_01_sfnt_off00010768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10768 11000 bytes
SHA-256: 53426afa752fa78b354518a6cf11b139818690fbcac51e0dd6612246bd7cc7a0
font_02_sfnt_off000120c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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