Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d205f0398ba294…

MALICIOUS

PDF

67.5 KB Created: 2021-09-18 13:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9921c32b18f11ee66a4d934afb3e2ba1 SHA-1: 4b1f00c96a856b43258695b688fc57568598f727 SHA-256: a2d205f0398ba294e0d1a04d0c77988369ac6b31726814e9cf0477785b1a5493
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and link farm indicate a likely intent to exploit user interaction for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 67 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://turinhotelcompany.com/userfiles/files/26289427640.pdf
    • http://transgusto.ch/userfiles/file/50887167454.pdf
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/52717826605.pdf
    • http://xaydunglenguyen.vn/upload/files/e0ee72.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/3jrubb4edskasveept68h7p0o6/zokevika.pdf
    • http://restauraceeverest.cz/userfiles/file/20883400882.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/58392542694888407eb92a64dc44c1d7/13807602554.pdf
    • http://veronikavilla.hu/userfiles/file/31043401620.pdf
    • http://ugrctrani.it/userfiles/files/jobonami.pdf
    • https://clinicamanila.com/ckfinder/userfiles/files/kuroka.pdf
    • https://megashina24.ru/files/files/defuver.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/161401633b3342---fozuxapirogigubidejut.pdf
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/razigezuwuxuniz.pdf
    • https://sentinels.ro/userfiles/file/kisiwosoterinufematokaken.pdf
    • http://montazerangroup.com/uploader/file/40419125628.pdf
    • http://congseng.com/uploadfile/files/24540818563.pdf
    • http://oembag.com/uploads/files/202109180949231406.pdf
    • https://firsatpin.com/calisma2/files/uploads/jekawimelufulataz.pdf
    • https://abyway.lv/images/ck_images/files/32683407449.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161314ee24b021---midimogasobinenegajovi.pdf
    • https://daiichitravel.com/uploads/news_file/lategiput.pdf
    • http://gardatrans.com/content/Files/35480564802.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=free+live+stream+websites
    • 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_off0000ae79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE79 16792 bytes
font_01_sfnt_off0000c690.bin
fa0c6c4960deb72a431a871a40aa7f86a9da2543360d5eb4ca3b926826737640
pdf-font-stream PDF embedded font (sfnt) at offset 0xC690 10316 bytes
font_02_sfnt_off0000dde6.bin
48550a40fdab9beca704aadc13ba1486217cb6f082c001b9e635d75caa542908
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE6 14236 bytes