Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7113a668805d04…

MALICIOUS

PDF

89.2 KB Created: 2021-06-27 20:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4484f8248d570227dbb0545b3aa65ee5 SHA-1: 08389fd6f90b26f6c56d9e392faff9554a62da0f SHA-256: ea7113a668805d04cb4c5913a429f631c142cdeead72e040beb129c8a0b16baf
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised or disposable domains. Heuristics indicate a link farm designed to direct users to potentially malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely involving 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 http://autodilykanka.cz/cmsimple/images/file/foxunuregunizevuvijijija.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/341b3c79e16173bc70900fb9120a8c9a/20826204178.pdf
    • http://luluscafeonline.com/uploads/files/87351997807.pdf
    • https://konferencii.ru/js/ckfinder/userfiles/files/71740463188.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/7c97eedbe67cca0fe61039a618dabe13/jusuzelebifodezozu.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/244007aafd83ba143442a35d993466f2/daloxagime.pdf
    • http://blevy.com/ckfinder/userfiles/files/xafuwejamanulidifu.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607838d9e7490---ponubewegipefet.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072496961381---jubipawupitusesabeduruj.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ecb283d23---39919439566.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/lspjso33cslo4v504pdbp1am1s/woxowu.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb23baf333---fumazededotaseje.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/82pmfhcoa43kv6ndc0mk6jv4m1/31414533284.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e64e902302---fotusabetunisuloj.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077efec7a998---fewakonitefifekulizu.pdf
    • http://phuquytravel.com/nguyenvanlinh/files/95895502924.pdf
    • http://jpind.pl/userfiles/file/lolilijajajokowiba.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160b7449c110c7---47475565364.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a77b80c6493---19422041498.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/9106ade3e89e135ca8642dcf99fb1258/noguseruve.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f10be01ec3---26949742283.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/87eb52f32e568703467ed57f61218b57/kirexejazonovifo.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c45d220296---21151120264.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b38a284fe98---395584845.pdf
    • http://zoncmswebsitebeheer.nl/files/editor/file/zedimurivopaser.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/cvlm8rlu00kep90pibvjjsfnhj/71230098517.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=creed+thoughts+blog
    • 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_off0000f9f5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F5 16792 bytes
font_01_sfnt_off00011207.bin
b297f0e7994533153bd82caa06fb7c7d828152aeed13463d8acae7759cfe8e21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11207 17124 bytes
font_02_sfnt_off00013e60.bin
b6f88f792e4af334d02bb6695e040ed9257139f203c2b546a92ec82d3845ce18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E60 10440 bytes

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