Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ed1b7912280026…

MALICIOUS

PDF

88.7 KB Created: 2021-07-01 13:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61c26e546216f0ff030197b401544b61 SHA-1: 40cd383f9c63f2a55c6b1ce2225a243ee4057419 SHA-256: d3ed1b79122800267fe8d75a14208663e052c783e040fcf5c92e3f0b5dfe2556
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=meaning+of+requited
    • http://klimatyzacjaradom.pl/userfiles/file/raxenezugegogopene.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/8406ab2a9825889d4b357f087c7fa0b4/22984800513.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/35215eb4ab1d8702a65cecafb59d4bc3/11522495514.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b282238bcc---61204145105.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16080c0d179b6c---jobarusuzepebulodo.pdf
    • http://maternites-catholiques.org/ressource/site-image/files/81836985739.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/a32eb311eb36f3d561ba139443bb5b40/69770377582.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160c30ab0dff1e---lovonojogafikaval.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/gusffc3f0o5fbn7eokbpmph4pf/jewabubadejefok.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e9bdd14ac---72470642055.pdf
    • http://originalcheck.it/public/img_admin/file///minikotesaj.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a82d666a5df---69494398164.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/51600b82b22b7811233b2f4add14d24c/98517378169.pdf
    • http://sevimticaret.net/userfiles/file/48206654743.pdf
    • http://yakutiaprime.ru/SITE/files/editor/file/21272302998.pdf
    • https://koratspring.com/upload/file/guduxatovajajikazugeb.pdf
    • https://i-chat.tw/js/ckfinder/userfiles/files/duzojutovexesoz.pdf
    • https://banghenails.com/upload/file/nebolakinovewiwixiguzu.pdf
    • https://edu-mate.kr/_UploadFile/Images/file/90220607659.pdf
    • https://rajakedua.com/contents//files/fabog.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d94ef73ab1---bozofowatebawiwabure.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070f7acb8b18---67318703168.pdf
    • http://aaaexpressheating.com/userfiles/file/17102785865.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607590b63fcba---36185235587.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16070fc05a49fe---womajulunevobigegad.pdf
    • http://houstontca.org/Content/uploads/files/pesodo.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c56bad97ff9---446887233.pdf
    • https://cambodiadriverservice.com/userfiles/file/xuzatamajoga.pdf
    • 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_off0000f16c.bin
805c981c64519e06fcc51015652c2366fcdce5dc7e9a29173d1d3fe00bbc5f12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF16C 19556 bytes
font_01_sfnt_off000123cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123CD 16792 bytes
font_02_sfnt_off00013be4.bin
51edd242b5f001fb96fe5dd4b7b292de5645d2370c6e52994a059b5f6d445bf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE4 10552 bytes

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