Malicious PDF — malware analysis report

Static analysis result for SHA-256 b742e2eda6991338…

MALICIOUS

PDF

90.7 KB Created: 2021-07-06 12:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1c5c9430fb07cea95895c09cb3405a2 SHA-1: d2b7cb2b24c59476a628aff347d1191f1791ec09 SHA-256: b742e2eda6991338dbe82ed3d7f99edf317685e2c328de3de0d1dd87d285454f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to PDF files hosted on compromised WordPress sites. These links are likely used to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://nomylo.ru/uplcv?utm_term=the+ore+chromite+is
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a902b0011a3---datavopijukadeginurilul.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/ff6ef9435665c29b1c08e171fe58213c/pobedinoxepajumatasifi.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fce0a77318---koxofugewizevosisip.pdf
    • http://zcapitalcrm.com/app/webroot/uploads/files/fegik.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079de357f05f---vodowekazapetutaruduwanu.pdf
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/19073235207.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/396e63fb55859c756ec9e237a94ce5da/bedetadizij.pdf
    • http://edgecs.net/documents/gedivibumeseruzupeko.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/78552224097.pdf
    • https://profipreklady.cz/www/ckfinder/userfiles/files/60030839546.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/a2903938bbce44e5fb21bdcab5e75016/puwuxevinek.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c96fa1ab89---towojokegijefavitoleta.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/c360f6b4aea2fde119523a7bacc220a4/39098131419.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a011b763826---52822274957.pdf
    • http://noahsmarinesurveyors.ca/userfiles/file/59051636801.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160779bd666112---53548542158.pdf
    • https://miet.hu/kepek/kajuroferaf.pdf
    • http://schokozentrale.de/idata/firidiforixumunuxogufofos.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/f3e79275808e1fb814527daa5216129c/38711864959.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/xevuvoludazaxewetetuv.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d08959b7a0---13177584651.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010031.bin
025edea467be8af9a4f41bb278b71189343c8b1372d8fb664b8c756e91153b40
pdf-font-stream PDF embedded font (sfnt) at offset 0x10031 17804 bytes
font_01_sfnt_off00012f0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0B 16792 bytes
font_02_sfnt_off00014722.bin
8a6bee4888a627860ff7e149e030d98a43b9eb3ccee3003ceba54157223e3256
pdf-font-stream PDF embedded font (sfnt) at offset 0x14722 10148 bytes