Malicious PDF — malware analysis report

Static analysis result for SHA-256 089b48e690a351d1…

MALICIOUS

PDF

88.4 KB Created: 2021-07-02 22:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90040cf3e902b399f44d3426a4f0e9d1 SHA-1: 5b9a158ac5590e89fd51b97738c999b7ec072e6b SHA-256: 089b48e690a351d10379500dbbe15cfc6476be1410022b68bf92ee11cecc26d3
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to exploit vulnerabilities or trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/91p448ga00bhtv61pj7d6fre10/72969707507.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/874ece8f4229d648efa6034b3a9b6605/tobedofalumok.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888b8c9b1ed---5384082593.pdf
    • https://sgotomotiv.org/upload/files/kegajutasumok.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/4gnvprhprbb8pvbdr3ds28qpqq/3930175456.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/qk44e70v75i59rt4hpngm0tivf/49789543606.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073a5e4e488e---suzixuj.pdf
    • https://greenvalleykerala.com/ckfinder/userfiles/files/korusokematov.pdf
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/peusb6va331tg1uo5j2vmhafeo/toditunaseripoxazamu.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a6af9616aa8---81628913864.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fedbf545db---naxasorofirodetel.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12dedad98f---39619634813.pdf
    • http://thecobbfr.com/clients/4/43/4363d5a08aa72aedcf7f7d4dd0675897/File/16714866739.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/55c6c4a6318b532297ed6396a9fea319/vowemuwebimasevorabobuzi.pdf
    • http://metabolit-plus.ru/files/file/xolezefobeguregumojukifi.pdf
    • https://yodobashi-church.com/58333231481.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/da3001ed1b0ea3374701b1e1ac2f896b/pijukosawuxepu.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aba54b66bbe---mujurigus.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/4230bbfab8efdc21ace1bd8df050be15/desijarodejesidem.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/915daf739dc34b3d808cac899f5e9d37/25764148076.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/rrubninbugul39qcc6h1k34p2i/mozovudurofusigiradewajaj.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/ee8dbf0ef75e7c5a53057cb0b8884aae/45311211341.pdf
    • http://kowel.com/ckfinder/userfiles/files/1624224904.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b28c017daf---84579050321.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=international+business+a+managerial+perspective+8th+edition+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_off0000f552.bin
a63378ca7c9b1796cb68cd6526b2d5285d7a3772327f0973c4f4757532cafee9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF552 11532 bytes
font_01_sfnt_off00011012.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11012 16792 bytes
font_02_sfnt_off00012824.bin
231f0afc698b5ef53bb0c89ba5d011b7d54b05febc5e2496fe6680082902a2b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12824 16720 bytes