Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e445e73a003325…

MALICIOUS

PDF

91.5 KB Created: 2021-07-07 11:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 08bf6d7b255d1c574d70a73c0c6b60e1 SHA-1: bc2ade8b1adbe7ffe73393722613079759802e8b SHA-256: f3e445e73a00332525ab3fca09d5e95e31dfc12b7910e0f818544bfe11ce8c95
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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 https://smidgel.ru/uplcv?utm_term=are+soda+crackers+fattening
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4916c9278---1318844343.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/679ad401e74935e0f88ba54f0bf31419/zizovebirofupa.pdf
    • https://liur-krd.ru/userfiles/file/76281988554.pdf
    • http://shinex-auto.com/userfiles/file/32687046582.pdf
    • https://anmoul.com/userfiles/file/22645316818.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b755a058ba8---pibipozo.pdf
    • https://avphunter.ro/ckfinder/userfiles/files/80203004600.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/3c7flgcjhdv7mpcu2bhe1npl6a/23832862210.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d23bbbedf6---45732222861.pdf
    • https://actorconseil.com/files/file/bexajekudaxenibodar.pdf
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/f3d9b31e471bc147ef0cd186560c17ff/7152136382.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/45749aefcd6e5d2ea941375ad5986c74/pufuvavoped.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608b97a96977c---jupusojemunevapazurux.pdf
    • http://videofilm-tv.ru/content/File/rubijav.pdf
    • https://drlanda.hu/user/file/12947168944.pdf
    • https://sitpchemcieszyn.pl/_sitpchem/file/10253346266.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/fb750e639a1fc3429d29c6af594b8202/jirijajiwajupovupavava.pdf
    • http://accessprecision.com/userfiles/file/gibiwalo.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160828f2f00b42---kugojibisedaponusi.pdf
    • http://brmhn.com/userfiles/file/20210524044636_yrrw7m.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098786c36031---zamedipiwolaxuwanaxut.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e3019175f---31198643529.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16073fdb6c9e83---dipamobigafesib.pdf
    • https://247hvac.ca/fabulous1/uploads/files/mujudukavubanonosugodebif.pdf
    • https://partnyor.az/userfiles/file/zogaxigizagef.pdf
    • http://sklepjola.pl/userfiles/file/56701225153.pdf
    • 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_off0000ec30.bin
732b91281c08c935b7716a5649ab897a439a920e86a7933ab592f872890c4c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC30 17388 bytes
font_01_sfnt_off00011987.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11987 16792 bytes
font_02_sfnt_off0001319e.bin
f0ce61f23e994f684a01b96ff1bfdaeab7677587fba95417884eba67659a3b3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1319E 10680 bytes
font_03_sfnt_off00014a16.bin
45647295bf3e6975917d2c46c854a2f040b6d2f4fa9dfc4d8f9276b78401693b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A16 16396 bytes

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