Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3668d5578dc246…

MALICIOUS

PDF

94.3 KB Created: 2021-07-01 11:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bab5aadec51a6ffac13f82efb46149a8 SHA-1: 825267879f2467f59e8b351bd37834ba925fee67 SHA-256: ad3668d5578dc246a0f66f26332b3e28ee96073901314e5036ae7d4ce188d0ed
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 ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable domains. The primary purpose appears to be directing users to malicious content or phishing sites.

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://sgyscom.com/upload_fck/file/2021-6-10/20210610144612541641.pdf In PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/jegikoladibolefamizodunum.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/50343930327.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/telisesi.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16073a89dc2398---wuruzuzixezolegunowopanaj.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/lideloxenufime.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/vulelabowulor.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/bobolugafejoluvux.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/37653023186.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080e430a56d0---4241813431.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/namene.pdfIn PDF document text
    • https://samowar.ch/upload/file/zazaxa.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/c63c72caf78d6de1b06d74e440cc83a9/suradisaraxivijigenop.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/makunisanivezevagugi.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/7532171b2a1e3badf5403e14545d1688/siwaxudabofupogesolerasab.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/de02d32d0d76c734edcedc41d18134ba/gumub.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/62016324079.pdfIn PDF document text
    • https://fuoriscena.eu/file/47588843792.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/24fe3b6b8931c05f681898092e07563b/65838454884.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c6403b1d6---mamadije.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/ab3e7f51651c229bc276bd966e8ef333/kenozetumisekinafuzefa.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/4n73se3s5rikeam2a8cf8652s7/tasoxof.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/92360c89035496a33be4576b3199295d/68864531537.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=is+dolphin+cold+bloodedPDF 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

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_off00010eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D0 10344 bytes
SHA-256: ad09a77ae04266f39577a95f5da32455bd87a91017fedc5d767639bf12626cc4
font_02_sfnt_off00013dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBB 17548 bytes
SHA-256: f7e14d5491ec9da0249c1dbff9e0e409ae25337794e6dd09ac1baafeac289bfc

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