Malicious PDF — malware analysis report

Static analysis result for SHA-256 44206f7b26293c65…

MALICIOUS

PDF

110.5 KB Created: 2021-07-18 11:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 75ca34d92b0482db54636e2d6ec6ea09 SHA-1: cab0539ba1139667a74be0d6d9fca8decb4f5d55 SHA-256: 44206f7b26293c65e15f27c1775affac6376be05a7023d66a7977cfeeac3b826
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification strongly indicate malicious intent. The primary attack pattern involves directing users to potentially malicious external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/bbbeb281f64b42a83493342f12805560/xopifesesejuxugexugimig.pdf
    • http://colescastle.com/clients/875019/File/78032270845.pdf
    • http://cn-daomeng.com/upload/userfiles/files/e9c4c42d89b44432d1694447471dffdf.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/ummm58aj57l5bl7519r1j7mgg2/36142248615.pdf
    • https://robertbah.si/files/file/64740441431.pdf
    • http://ei-windykacja.pl/upload/file/senubogada.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/51sbpkae0vnaghde3q2r31t1sg/tanovukufisasuzutome.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/sagazozudelora.pdf
    • https://santevita-bg.com/ckfinder/userfiles/files/37929322900.pdf
    • http://thuduchouse.vn/pics/file/fokisivebopipoxog.pdf
    • https://strechybenesov.cz/content/vetikilibegerapaka.pdf
    • http://quaint-house.com/images/blog//file/63027665111.pdf
    • http://ahkjt.com/upfile/file/14105037622.pdf
    • http://anysoldierfundraiser.com/clients/a/af/af293656121fcb8b60a8c910089dd81c/File/gozexisavamena.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb0b23eac1---nabimanibelotodogube.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3875d85463---pojipunepugefun.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8536ca1066---kobedano.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/597edbd7e276102655e81d8f0cd3d181/jogapekekosifobigevanuwu.pdf
    • http://adlinefor.com/home/webagen/public_html/korn/data/file/70236108042.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608097692356c---tepekijudi.pdf
    • http://gandolfiarchitetti.com/userfiles/files/vevuxakuvagudududid.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b17a2191d83---zefikojalarovituzatumifi.pdf
    • https://barcelonacentremedic.cat/files/galeria/files/papimiluki.pdf
    • http://goergenpainting.com/clients/0/0d/0d1038892961fdbf96b6a8e7e8daca8f/File/12574096827.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=sexually+deviant+behavior+meaning
    • 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_off0001491d.bin
1002bc2123cebc30e0c69bc1a1aafef7291e733bb1c5e32f576327eda34d6c6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1491D 19096 bytes
font_01_sfnt_off00017ab9.bin
8fc29a2eea8a4b7d06205271963ae28b60e71a5df506a1705f0217b3c502001c
pdf-font-stream PDF embedded font (sfnt) at offset 0x17AB9 11124 bytes
font_02_sfnt_off0001944e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1944E 16792 bytes