Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda7babb57b86704…

MALICIOUS

PDF

84.4 KB Created: 2021-09-10 22:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7471968b72dd835d1615021c6047dea6 SHA-1: 1ee4d1ecceb5f4a2607867f27981d2cbea000ecb SHA-256: fda7babb57b86704ee89e6de7a59fab23abb76934fa80524cd55eeccae74aa8a
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of link farms on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5466

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 http://cwpni.com/userData/ebizro_board/file/xoxibuwa.pdf In PDF document text
    • http://ashole.hu/UserFiles/File/15183259185.pdfIn PDF document text
    • https://calson.garment-pro.com/ckfinder/userfiles/files/vuwup.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/50467670255.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/qljnglt1uj90j0lltq8uniktt0/5676507721.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/zovafidekupaj.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/20723329544.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/6060048971.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/62552924231.pdfIn PDF document text
    • https://mimpiindah168.com/contents/files/doragunuxijexenabomi.pdfIn PDF document text
    • https://alaskaproauto.net/nbloom/fckuploads/file/bubikeboniravoj.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/monovijigifel.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/54346916811.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/58708222628.pdfIn PDF document text
    • http://totoumi.jp/upload/file/zesor.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16130db585a1e3---kaweloxewukupapugo.pdfIn PDF document text
    • https://stonebuild.bg/f/uploads/files/fowugibefagegoro.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a6861727b---33058068232.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/161325cfb00e8c---roluxe.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/kujezogipagalipoxabaxej.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/tifiwanezujunudikusim.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/3687291767.pdfIn PDF document text
    • https://swiz.eu/files/editor/54993441525.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/94319377603.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/32455637326.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/pitoribu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=aladdin+full+movie+originalPDF link annotation
    • 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_off0000f1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DC 19732 bytes
SHA-256: bdde706844b834aba65c92c9b67dd365eaa58409b2d0c545c65c90e744bbb038
font_02_sfnt_off00013dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC2 10580 bytes
SHA-256: 196119789961dde331fa96c6fa9efc45aefe50192d4ec7c46967ec91bd3dfe22