Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2cc98c0518eb9d…

MALICIOUS

PDF

86.7 KB Created: 2021-09-02 23:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3a8fdad60842b6de33829165861e0603 SHA-1: de600f0ffe7f351a35a3de87736f5bfd6012f059 SHA-256: 3a2cc98c0518eb9da1ce9084187403f39e88440fe42f214e66f619766443db3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and compromised CMS upload links further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://smidgel.ru/uplcv?utm_term=vegan+diet+to+lose+weight+pdf PDF link annotation
    • http://konditsionery-reutov.ru/upload_picture/file/paxosadasufibelonulofo.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/a42ed7b2ba0071023a898177bf339363/34079127111.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/11454573548.pdfIn PDF document text
    • http://darec.sk/files/files/62945992873.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/20341440408.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/akubph9lroqip5471qbmhhseo2/wasijodifaxepatanuvab.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e66a16b97b---25901416854.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/sapoxebosinikuvotiwe.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/4e17bf447458636eded882e0abd2d718/nakotu.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/90177945682.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d025f42bdf9b7d1c0013ed333180b54d/71270982431.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/xelububuxafit.pdfIn PDF document text
    • http://library.nesdb.go.th/ic/admin/ckfinder/userfiles/files/84689075595.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/luvetupabu.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/fuxidezifitunolopotes.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/161121a9a8868b---10699647212.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/qp58s52178bka6mm206l9vrdlf/7544517901.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087ae1dcb7da---10481202432.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/kupetirejikerino.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/94176067202.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b7da51b3774---47544182573.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210731010203.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/rezawuribolizepejevu.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160df3219bbf5a---vavunakedetebi.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/tspspccfjad7gdvqasreb9cfu7/77659190414.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7A 10732 bytes
SHA-256: 4b6b4daa1e45807cbc22043bc439bc77226543cda5505a46c35efb1005eb80d9
font_01_sfnt_off000102eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EB 19376 bytes
SHA-256: 670b6a80e38759db8676da5dc613162fda13a6c3679896c826ac7eeee2e1377d
font_02_sfnt_off000134df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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