Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44ee07c19b7c011…

MALICIOUS

PDF

68.8 KB Created: 2021-09-27 22:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8667deb87950e51d45bc455bb4d46bfd SHA-1: 073ccacb89b3b0823fff3475c394e80e3d3bdbf6 SHA-256: e44ee07c19b7c0118e24f3092c0c0b022e685131a95c1485a570ab6ece96b738
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a full-page image designed to obscure clickable links, a common tactic to deceive users into visiting malicious websites. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggest an attempt to distribute further malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://wonderful-foods.net/userfiles/file/87115449446.pdf
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/degozabomolulubufagawa.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/hnbrb69d5ffn772b80c4aniku1/zalawuxutozifesage.pdf
    • http://vietdubai.com/userfiles/file/17503270094.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/l2etloe6eo6670dsnni18prb9d/52497974204.pdf
    • https://stehovani-ostrava.cz/static_pages_files/file/mefuba.pdf
    • https://nedimgame.net/calisma2/files/uploads/66094303431.pdf
    • http://otczenacts.com/media/files/19027576675.pdf
    • https://coaching-jk-academic.com/ckfinder/userfiles/files/lululonawaxidabera.pdf
    • http://sjar-tech.com/uploadfile/file///2021090417173175.pdf
    • https://cakenflowersonline.com/userfiles/file/78922720088.pdf
    • http://www.s4b.nl/upload/files/mekotezopolirojatorome.pdf
    • http://kristiankutschera.de/userfiles/file/82959971933.pdf
    • http://www.focitabor.hu/userfiles/file/23053782514.pdf
    • http://pravkniga.ru/files/userfiles/files/mizumagabugupetomelut.pdf
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/13213259056.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161495d550ea03---58254353002.pdf
    • http://parfumerieindex.nl/images/uploads/valosem.pdf
    • https://sergiomauri.com/images/file/37370698727.pdf
    • https://podimercrm.com/img/files/laxezokodefetomul.pdf
    • http://paraglider24.de/pics/fotos/1/file/xegare.pdf
    • http://sperrincaravans.com/images/file/96444918841.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=things+to+do+with+honey+in+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_off0000b01d.bin
d756faea4450bd684aa474e0a55702f0baf0b44325928a4ac6ba3fc8b0cd3261
pdf-font-stream PDF embedded font (sfnt) at offset 0xB01D 14500 bytes
font_01_sfnt_off0000d422.bin
2d0ba21b969e71fcc82309247ed6060ed5bf0cceeaa90e7ac745001ac304aa23
pdf-font-stream PDF embedded font (sfnt) at offset 0xD422 11040 bytes
font_02_sfnt_off0000ed85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED85 16792 bytes