Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdcf588af1c9970d…

MALICIOUS

PDF

85.7 KB Created: 2021-06-30 10:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eefa4800132961a60b75518f11fcbdcd SHA-1: 6fb20f75b975423af85ed4c11b01c836cf3ed8e2 SHA-256: bdcf588af1c9970d49fccc39b692890b8e24cbd2248a6580315ccb2ffff3aa1b
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites. The ML classifier and ClamAV both strongly indicate maliciousness, with ClamAV identifying it as Pdf.Phishing.Trojan. The file's structure suggests it is designed to lure users into clicking on these links, likely leading to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/7f81ca7bed912bb2aaa6dee8339863c6/winibimubaselanaxolobox.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160c87de3e62e2---91246831758.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/b97df5bc22598c5a1aa835d11c7be60e/wamuxurupaj.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68d21228be---31226837131.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/aa62c75969196295fad5a274eb575341/bizarujogazamezuxejen.pdf
    • https://jxloanchien.com/style/postimage/file/gesugisum.pdf
    • http://best-infosystems.com/userfiles/file/fepebenobulovalilabaza.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/9ac4efc2266231d23e66d3cc9f14ba81/vuxezemunirixapakowuli.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c658df82e12---18774994535.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/d5bcfb4546ffa6b043dd3c718d4af572/2608839776.pdf
    • http://sukhabalka.com/files/file/59182787094.pdf
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/zovawujibopetep.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/bv477riqdu6osljnsraj9k77l4/7563766066.pdf
    • http://martonaroniskola.net/userfiles/file/jogezuxapavebavori.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2998fdf08410fdd8efef24b3e9344aeb/fikajowitekijepaxapig.pdf
    • https://aquafilling.com/userfiles/file/gipokidaboxatelaravivizut.pdf
    • https://alice-immo.com/userfiles/file/fiwosef.pdf
    • http://lycee-elm.org/userfiles/file/wamipojamiwimalamem.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/6mmipis2i5cojjk2afa8ilvjp2/80488295074.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/286aa7c6996d337d2605dee26d93c16c/79363618514.pdf
    • http://juha.be/_files/file/gufuduzemi.pdf
    • http://seoulgreeter.com/userData/board/file/balisemogijujejarofiraguk.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+do+you+name+an+animal+on+minecraft
    • 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_off0000e8dd.bin
817f2f7be6b5171700ba60555dce3b817932d72f57fd84a173f74bc912ae0d3d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DD 18584 bytes
font_01_sfnt_off000118bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118BC 16792 bytes
font_02_sfnt_off000130d3.bin
6e5b3ff1ae5611e0096e96d7d70aafc552061d9819f85a780d74e32ba18d6d90
pdf-font-stream PDF embedded font (sfnt) at offset 0x130D3 10760 bytes