Malicious PDF — malware analysis report

Static analysis result for SHA-256 0063654a51bbbe43…

MALICIOUS

PDF

92.8 KB Created: 2021-07-21 19:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2fcfc1caa244e17953dda8a7c8d9ca40 SHA-1: f7744a2f40c34037c780814ea93a3445da738218 SHA-256: 0063654a51bbbe436f87fdf7a4cacedf3b98fc057169f6a65efcdca858343392
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content or phishing pages. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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.
  • 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://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/995p9iu9qtg2pm94rvladi2a3p/linejonepisedib.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/6ece7397e6f23368000dd80c6f8ce608/mowixofasef.pdf
    • http://creatinglifeoptions.com/userfiles/files/jivabapix.pdf
    • http://kentcliffordreunion.com/clients/a/aa/aa84b18e55fac3ff3c25336c5005d9e5/File/48685291306.pdf
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/zezutedozefonosiwimod.pdf
    • https://derechosenred.org/aym_image/files/54305848981.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ca8a61f0ee7---69979364989.pdf
    • https://agrilaui.com/userfiles/file/gujijisufuget.pdf
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/44819278692.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/221fc3b794d4c8989a6f90cb7fbd709d/5831251396.pdf
    • http://synowka.pl/galeria/file/nifisekazuje.pdf
    • http://andreaslasnik.com/data/files/jamemekujefixodegidezemad.pdf
    • http://portalcom-b2b.es/img/user///file/_0184867001621760362.pdf
    • http://mmbc.cz/_data/user_files/file/tevanebizusax.pdf
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pupogupu.pdf
    • http://infrabud.eu/fckpliki/file/90144923874.pdf
    • http://parkhighclassof60.com/clients/871169/File/zowulofiseg.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/e8787dedf5dd68d67087802b404fbc46/72161172389.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d01eb135d9---zeribenodim.pdf
    • http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/pumemonuj.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085f9da871dc---40707472378.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/0ab5ab24616d5f13fa1a636c0bb0b5d6/65536454221.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/dd62fb7bb82152d66c7e98cdee57833d/josemebujidon.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=meaning+of+belied
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 16792 bytes
font_01_sfnt_off000104de.bin
bbdd4a601cd41095ffea0b03e6f7c8bed8819b41ab1cc8dad65c7831c84f6d9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x104DE 10296 bytes
font_02_sfnt_off00011bdc.bin
135353b3cd72f5ea6fcba1acb3fc917e896c14248526b71bcce198c688045bdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDC 17048 bytes
font_03_sfnt_off00013496.bin
43eea766238d62aded2d2ece19b357a3c51f206a1e1e2762b2647046821bb077
pdf-font-stream PDF embedded font (sfnt) at offset 0x13496 18368 bytes