Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce97729e16fdd86…

MALICIOUS

PDF

247.0 KB Created: 2021-07-05 09:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5b6d487544b223aab2d644a0290bf803 SHA-1: 18c6a9b1a0f24b9ac29ced3efccd7fcb770b2d38 SHA-256: 4ce97729e16fdd86bd6449e02623d4e0e8a1c62ccc0d694ed6ed75042b150f9e
166 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It contains multiple links pointing to compromised WordPress sites, suggesting it's part of an advance-fee scam lure. The document body is heavily obfuscated, preventing a detailed analysis of its specific content, but the presence of numerous links to potentially malicious PDFs strongly indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9783

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/7b8a41f5eac456183ea84d0c72a93acc/fidejikemamizevowamojuk.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbe7c228db---37343578242.pdf
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/tumoravuzokoma.pdf
    • http://inwallendorf.de/userfiles/file/90221089931.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/zekolurewovilovebumutu.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/4e597b828dd27c2d6ddc161c51c65a92/robopevax.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2009d835d---nuzizufixo.pdf
    • https://aspirans.com/files/file/74340429574.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85286e2c5---55566970205.pdf
    • http://scro.ru/pic/file/fibatonir.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cba13471836---jikudosowonetaz.pdf
    • http://camionespanamericana.com/userfiles/file/23861058512.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/15229aa8289cf07ed56a5dc4d4564fcb/tatubodut.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/0c67ae999acc75ccd93efb8a6cdb8c97/gokaxu.pdf
    • http://www.proyecpapel.es/ckfinder/userfiles/files/91636842255.pdf
    • https://coevent.ru/upload/files/94810293499.pdf
    • http://afgventuregroup.com/cfiles/file/4006266782.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8951c08165---57691723513.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e91e21d1d2---kalasinovejibunozevuboge.pdf
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/9ed7769dff40f44fbb95a8530e8031ef/80549867497.pdf
    • http://brandnewgoods.net/userfiles/file/vedadilifudobatu.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/aqfl6pp8ifiiat3lu2p1k75utd/42172668130.pdf
    • http://kaupa.cz/userfiles/file/zibodolon.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5070d5eaa---21646914313.pdf
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/nosozelibatiwat.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=mbbs+biochemistry+questions+and+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000363ec.bin
f2af7d643cf9b64ea1074c3dd859279140c00e56e6c9a2a59ca7e10f1427f08f
pdf-font-stream PDF embedded font (sfnt) at offset 0x363EC 11168 bytes
font_01_sfnt_off00037db9.bin
cd7e861c41bdd721dc10b6aebefb907f06c87d48e8265e8f299c8603e082cf02
pdf-font-stream PDF embedded font (sfnt) at offset 0x37DB9 20428 bytes
font_02_sfnt_off0003b3fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x3B3FB 16792 bytes