Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cda2d2c464dd100…

MALICIOUS

PDF

80.4 KB Created: 2021-09-05 03:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5a4c1070429ed0ae510b3510520c6aa9 SHA-1: a5c972af259e11db89c76a3620f916bcaa09db05 SHA-256: 0cda2d2c464dd10043ebc3dc73c8cdb472f02a569f42df8ac047014dcaed05cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The primary attack pattern involves redirecting users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://coretry.ru/uplcv?utm_term=cara+membuat+alat+serut+es+batu+manual PDF link annotation
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8aeea3947a---88450246673.pdfIn PDF document text
    • http://haki.vn/uploads/files/vebuk.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/32932874704.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/fejajuxok.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/xojokiwosutirapuso.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/r7rpvh3k35b8ijac965cdb0vfu/4305628897.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091189c67582---teturema.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb8ad4e82b---wanajimaxidij.pdfIn PDF document text
    • http://theettiaresottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/muruputeziv.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b50fc55673---xugaperuse.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f84b39fc8b---50791483945.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090623ee065e---74989566349.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/bumokadogoredosojutu.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/97982457163.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/84605567145.pdfIn PDF document text
    • http://khochailo.com/upload/ck/files/65028919065.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/67050542661.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/letovovugobotogoxukewo.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/zipetikiropemu.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/87801261226.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/10008995692.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/45927069276.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/59bc8dc725de70ba2405499aa8286f23/javerefovara.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/161273bc948ab2---pimiragimutivot.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/13863308187.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/lodifigometegowikoxom.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_off0000dc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0F 15676 bytes
SHA-256: 10582dd98d223565c11051c9c84cbb1ed170b5008adc113c617b202905bec8f5
font_01_sfnt_off0001044a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044A 10328 bytes
SHA-256: 5d3e7370aaa0e3b1499f33c360730c466443fd7f215dc19bbf62a2707cfabac4
font_02_sfnt_off00011b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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