Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc38d6e5de394ff3…

MALICIOUS

PDF

72.4 KB Created: 2021-09-21 20:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ed1894064922043ea0b954bf0a891205 SHA-1: 7f18edfe84b2fe264ea9449013649745b4d63ce7 SHA-256: cc38d6e5de394ff3635a4714219193f8ddf224b68362c2be19a120b8326ed8aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting, likely intended to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=cheat+sa+gta+v PDF link annotation
    • https://equimat-cheval.fr/file/72163873124.pdfIn PDF document text
    • https://moolans.com/uploads/files/dezirabivogajesokidoburiv.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/nodapasagatewanuxaramiga.pdfIn PDF document text
    • http://semanbio.com/upload/files/39471796548.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/10663900040.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/584803866.pdfIn PDF document text
    • http://quesnelfoundation.ca/userfiles/file/josolivirasolifisupaxoxi.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/38825879221.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec4fdb77c1---77668645249.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd9969c6b1---torobizemavi.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/junejidudodegawubu.pdfIn PDF document text
    • http://www.moyekolodin.com/files/xekar.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613df16e5c283---41652384239.pdfIn PDF document text
    • https://mar3ol.com/Files/files/rupokegonatirajewano.pdfIn PDF document text
    • http://roseeskin.com/userfiles/file/20210920091859.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/30508679972.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/runaginomeduwexu.pdfIn PDF document text
    • http://dasbluemchen.com/64301682699.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/8578072834.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/tilemanepuwokinebirog.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/5715182734.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/b42cd9bac237c609b09eb15de5bcb959/78999592018.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/86142327196.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/temarure.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143098ee5038---powuselijiviliw.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_off0000bb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7B 16452 bytes
SHA-256: 7db5b4a6611f20a633c9f6d7e9847c65dad077983df2f61270e75b873e32f803
font_01_sfnt_off0000e57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57E 10024 bytes
SHA-256: 0f110fb2dacf9b1169d7e7b79b7146eba132d77fb476134c17fe26a00ebca7dc
font_02_sfnt_off0000fbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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