Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0008450b2a2bf0f…

MALICIOUS

PDF

85.0 KB Created: 2021-09-21 04:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a2b5a67331ffd1522e9b131a410fbe88 SHA-1: ba44f1caf1c855e14d77cb151173504f5e5eea0c SHA-256: d0008450b2a2bf0fa218c0387d642177c20c3a8d6ff1a234c1bb4c0e05d2dd94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised websites, likely to lure users into downloading a game or other malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/7e87c162a3e3192b6826e6da68958ef9/57410765166.pdf In PDF document text
    • http://madurastones.com/userfiles/file/29502139892.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/wutuwaralufu.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/36390141053.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/jevulezodoxuzunosogizuju.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149131138a7c---51336868717.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/sixojusesatuba.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9b40036bf---wususesabisujiziz.pdfIn PDF document text
    • http://builderall.info/userfiles/file/jajewigimutavo.pdfIn PDF document text
    • https://viktorina.ledoritulys.lt/files/62162802781.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/1c350d633cc2c92f55d243afc181e08b/21062478304.pdfIn PDF document text
    • http://mc-opony.pl/files/file/naletuvotifavoriwemunumop.pdfIn PDF document text
    • https://petikdaun.com/contents/files/burela.pdfIn PDF document text
    • https://fivetc.net/uploads/files/fazuxonenoginad.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/2ekvophbraj92b1rgj52nm1m60/gizodejorilajorogajuz.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/gubelakij.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161429f3b743dd---33337739020.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/pikamaripidororibawafifup.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141538ea659d---28842394499.pdfIn PDF document text
    • https://kimansion.com/uploads/file/58275097851.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16134293d70ddf---zunoja.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/zufimagifivazaxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=gangstar+vegas+download+freePDF 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_off0000e136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE136 20192 bytes
SHA-256: c090eae548e700bd0c2995cb9aef3737f38914047478f43261a6ab2f8fa45ce4
font_01_sfnt_off00011616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11616 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2D 10628 bytes
SHA-256: 9f8ec94a45ba596334706bf9a43dab71407f76e4b28b4461b9a7dc4f1ed57a9c

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