Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a190ac29cdfa0f…

MALICIOUS

PDF

85.1 KB Created: 2021-07-21 13:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e1c2ecf992f63cdabc6ce26914562638 SHA-1: 68d8cd895dc7bcd3686ee2472cc482fb4750d2da SHA-256: 15a190ac29cdfa0fdf4bf19e80f6c33a91fb80c2a72b5915ce85d681c3db15f4
232 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and multiple links to external sites, some of which are hosted on compromised CMS platforms. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document attempts to trick the user into revealing sensitive recovery information, likely to facilitate account takeover or financial fraud. The embedded JavaScript and link farm structure suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 9

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://sanders-scottfamily.com/clients/26926/File/jozaf.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cf662fb6018---13231382361.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b498c6d69c8---34048228170.pdf
    • https://stallion-international.com/userfiles/file/50920382696.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160dc920a93bbe---gasulagakifa.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6d1c5b4e34726c3993dea428b10224b3/vunujoluvozavaxajeselujo.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/utm896egrvls8klf061qd43f2p/pegoxowuzoseganive.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160899c3a321f4---78944462906.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc143eed64---wipugiwe.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1dd40787cd---wujekifunokijebujifu.pdf
    • http://konferencii.org/js/ckfinder/userfiles/files/zujorelegepegode.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8473f080bb4db2960e90be2e832e50cd/16093331560.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/6t71sifii4n30icp97d46h3g50/wosoxamuxelipak.pdf
    • https://balajihighfields.in/userfiles/file/79032614337.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/4e485a1d5809dc5f0c27f792a177256c/vajuramewipevorozebudel.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/0094ad841547b4ebda40b31eac4678b8/50398672770.pdf
    • http://alpanelektrik.com/depo/sayfaresim/file/xubiboduzajifu.pdf
    • http://ducthoaudio.com/upload/files/95470503453.pdf
    • https://bwawarszawa.pl/upload/file/49582686613.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/4b0cfe28156fed5c6a7502107cd06f52/16850857200.pdf
    • http://novussiteyonetimi.com/uploads/file/32304728586.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d3225acb688---dariliwawuzipiroru.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a57806aa91a---dokotalava.pdf
    • http://sun-green.nl/ckfinder/userfiles/files/97701969299.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/00228030b86569ddc2cb3261b4355657/timevevajefowaginus.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=age+of+empires+asian+dynasties+cd+key
    • 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_off0000e2a7.bin
32661efcabc397bbba05bd4579ef657d4a397a3cf8b582b16791817b810d7467
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A7 18336 bytes
font_01_sfnt_off00011338.bin
89c7c92c4850be3a4968e7c260aa39c33eed5832af9088da9bdcd0b637e443b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11338 11104 bytes
font_02_sfnt_off00012cfc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFC 16792 bytes