Malicious PDF — malware analysis report

Static analysis result for SHA-256 7586697521125d22…

MALICIOUS

PDF

82.8 KB Created: 2021-09-03 07:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6dec7ac4fcddcfcc413d7c89d75e5fa8 SHA-1: 2c137645b280314eed58e3438c4b065bf11e0555 SHA-256: 7586697521125d22332c4a61e3c3e753a73af485bccfeac96d00a03f3064cd39
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV specifically identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggest a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the PDF and the URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://huntic.ru/uplcv?utm_term=lutron+maestro+led+dimmer+pdf PDF link annotation
    • http://www.malagatour.es/ckfinder/userfiles/files/25413971286.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/85466194641.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/h2knqhpjulob3955d1hnm6b578/88266455679.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/nufutepoluwidemitin.pdfIn PDF document text
    • http://tianlanlawyer.com/filespath/files/20210824225320.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/fumowutaludumabejefezut.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607dae26b1e22---fuwuzove.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/rugufuxebudojajizuw.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/mimuruvefenexa.pdfIn PDF document text
    • http://culfordequestriancentre.org/UserFiles/file/93750883689.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/bodevutogamed.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/e0clml97a70u95jpkqfrrjgi15/latawexakibepotodeforeg.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b418698bc5---xopedewebuxejojugizubo.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/b013adadee770671225ad9e3f1d7f1ac/xekamapigokufenas.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/girasasibegurisal.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079a3d2e04e5---41163318510.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/81880424517.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/6584192843.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16114b130e7daf---nuxogudamunadagodeze.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/19939032339.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/jetejivisumasi.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/xinogedenuzoba.pdfIn PDF document text
    • 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_off0000dcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF510 18440 bytes
SHA-256: 0310e21ab75d5b41abff506eaade22a087d0592dfaaab0b802a3eb8a5da45b22
font_02_sfnt_off00012504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12504 10716 bytes
SHA-256: 03df7f4194714884e3c805ab80ddaee783e73ceae7a0b76292b2a904e0a26607

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