Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bc0e2fe8bb7bfd…

MALICIOUS

PDF

86.0 KB Created: 2021-09-03 23:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 704ab89bcc96c2280d6149510e0a2daa SHA-1: 7332d62424ab380e573784326f895adf20923af0 SHA-256: 01bc0e2fe8bb7bfd71b11f044eeb20ada0c95c4841ec3ebd6d644169feeaa8fc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as a phishing trojan by ClamAV. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to various websites, many of which are hosted on compromised WordPress installations. The embedded URLs and the nature of the link farm suggest an attempt to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4150

Heuristics 5

  • 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
  • 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://chcial.ru/uplcv?utm_term=wbsetcl+assistant+engineer+previous+year+question+paper+pdf PDF link annotation
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b07f546fae---31734120496.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/xavataregi.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/56831580299.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/37995618223.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e568d0f254---lukaxu.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bea56f1d6---gikirafawegubafudar.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba76c2a0b7---ritelirudusan.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/32325307009.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/74988228328.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/925f2f05e6e324273b7cce0670b4b97f/batizixome.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/71630500307.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/nomaduzikexideximafux.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808a30c1908---lujunubixed.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/18ce682d102ec126206ff7474b645f65/41566823046.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/wonekaraviwutofegapavifi.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/91728449146.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/zeluduwi.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/754dab9a359f1d7d2e4fa1b985fc726c/89495199121.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/424597902.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/65851771337.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/3006459852.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/kasoxegojetebifo.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/xasinurojez.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 19796 bytes
SHA-256: 1ebb8ffc7760a1b107e303a4765d1f6c8c77cf755c397b71a28f82c19b7bf555
font_01_sfnt_off00012973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12973 11356 bytes
SHA-256: 112559c7ef581b787ae3364189992addfc280019dc9ab58655c96b81304cf1e0
font_02_sfnt_off000143a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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