Malicious PDF — malware analysis report

Static analysis result for SHA-256 a81c336b10249c8e…

MALICIOUS

PDF

86.1 KB Created: 2021-06-27 00:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0760584486624fb6d924699d61652b05 SHA-1: e8153bc91569c08ac7e4c493127fb60c265162ef SHA-256: a81c336b10249c8e90ca5fb6e6cd5d065539d13764ef5486bd7b675c330532c0
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other domains, likely serving as a distribution point for further malicious content or phishing attempts. The presence of multiple distinct hosts and links suggests an effort to obscure the true destination or to maximize reach.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://palami.by/images/file/fibalexudotudogolemenowo.pdf In PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940629545ab---dakipadu.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c56836bf85---gevexilikizilela.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/7e82bfe74b515fdbba5ec6ed769072c8/fatejaremurogezuz.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d04ec27b18---45619610259.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/49333cb7ecab7ddbd833bd980be226ad/52210977099.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/pepazagavilobur.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5afb0ade9d---wepigaxoxutebavajofadopev.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/39427888238.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/1jmt33ks4uovrqb9jgvpve4obi/kuvopatomiligupade.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/90adb7996c6104cd996e93a0215b8bff/47391005222.pdfIn PDF document text
    • http://castanienfamily.com/clients/74558/File/pevojamulevox.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/10692285017.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/15201779f05140e65a849771b3fe0d59/zowidebamidubutifemeris.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9be6e8dde---67644951428.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/9sv61gc0fa6g83q1dl16jbg4io/matudumabusuxulususepefi.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/xusarerosa.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/ff962b072dd234e080fc9cb58af2f35b/95567607222.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/vaxagubedananuwozijiju.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cd240e47a49---zuwumirutotuluzoxojotexo.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/31515bb539b19d9c45db2e2d034893db/32140919946.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/03vv1cu9fatael0igh6lesod80/vebem.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/a128f7087cb8570e9027090c537fe563/pogutugabusiwawidakifasiz.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/c746733a774eafe25a7c912ff3076f6e/laloparojavikumomelive.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/781fedcb5da46d53aab1dada71b2b14b/piwojavebiburonowezo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=7th+science+chapter+1+question+answerPDF 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_off0000ee36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE36 10764 bytes
SHA-256: eae80126042a3e429b0dd76fd1d3cd7dd239a85d1da2e455af583de1da08a1b1
font_01_sfnt_off00010718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10718 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2A 16212 bytes
SHA-256: 5c1e791405b985b09920ccc0e82a80a181f29c427dce86005798998a43bfb24f

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