Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbac6bbb4d13d1ef…

MALICIOUS

PDF

100.9 KB Created: 2021-07-07 10:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e0b7f7fa96a47721b98198400be95d2f SHA-1: b7386d1a4d39a88b77cd6159cda48a03a5f81300 SHA-256: fbac6bbb4d13d1ef61d0240676f74b214c21dd5dc5f1c229afc123a8be0cda5c
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a link farm hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9a3496305---giruxekisujebox.pdf In PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160878ad13f3fb---36589668723.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/plkk8fsuhse8fnhfgjb0p2hei6/jixuwavob.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/xelibetefu.pdfIn PDF document text
    • https://aneri12.eu/res/file/zivegukixokawovimi.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607567cf27b01---fegesajuzodiwegifi.pdfIn PDF document text
    • http://e-hematologica.com/users//file/29174777439.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a26ec22e2c---fojamebur.pdfIn PDF document text
    • http://mrs-edu.com/sribati/editor/uploadfiles/mixeb.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/l8lpng5jlad0a1r035ph1lq5u2/32303247588.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a133e91ecd7---lobabiw.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085aad3509b7---97025356766.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3fcbcd130f---nepovunutel.pdfIn PDF document text
    • http://meechoktoolmart.com/user_img/files/vunumiwabul.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/tirorujo.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/tiwulidigimitunejenex.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/4s2drhvb6f49g649jfv67geg05/73800572588.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/52507518916.pdfIn PDF document text
    • http://www.emailposte.com/pictures/67361671307.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53443dc5f0---dutorabukijekow.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/4nnuf4lf6vmbeblass3a0jcfo5/97285732194.pdfIn PDF document text
    • https://chp-travel.ir/data/file/dojigoladazonenubifurugu.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/cf4b1d97a24b60ce76fc9e40e9d85f62/xivuwedutamumufeletagezov.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/budisemigerazetiweladi.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/34193385995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=bloodlines+the+golden+lily+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off00012916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12916 10684 bytes
SHA-256: 44ea35e93ff2d57f2ca276ac02efa2d1ef0ba0b07ce427d71e048bc42f1502e6
font_01_sfnt_off0001414e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1414E 17232 bytes
SHA-256: c9bbe3f2e9717aaa5710c628716eb7da388e12a544a1963b009389aca6cee9b9
font_02_sfnt_off00016e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1