Malicious PDF — malware analysis report

Static analysis result for SHA-256 0911f56dea50a37f…

MALICIOUS

PDF

74.0 KB Created: 2021-07-14 00:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 8adb2da907da07d1b84e70b060474861 SHA-1: bf585b68a9aaebdd7698661d6911c2e9fb58d7d1 SHA-256: 0911f56dea50a37fcbaca765b92884df6c4bb6eef834144bf6fee0e4fd03b1f5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains. The PDF structure and the presence of embedded links suggest an attempt to redirect users to potentially harmful websites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://mobitransjogja.com/files/sixufobirerekodizep.pdf In PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1b8803a3f---9355831962.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a466c5b7651---60470007346.pdfIn PDF document text
    • http://szpk.hu/_user/file/bupagepawijutedum.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/wufixetinogisetegisugez.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/gudopotixesurifazi.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/89463251484.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/2efb1c16223de61a647fb0477bcb4d76/59281353133.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/3po0i8lu4ovrpdd84v8f0i39p4/vajin.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/6fd5166a0e470ff56050ccc774e110a9/xemoro.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/bb32df5433ebdce9633db318a00e974c/16896357470.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/420e07ccb7769cd259fa98514ad169fb/33375144465.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/60a3e6edc71c25108ff7c6da0e314e50/39763983302.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/dd663e8064500c41ac1390c667f3276a/vidadadigipujemetiw.pdfIn PDF document text
    • https://plasy.com/uploads/file/jazawunumenogubud.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/67360704938.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/70c1793d7c893e762a33f11d4a49b626/dukadojinex.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/zokejawanajopa.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/46557420858.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/093c02d8a5d9d408d68b489125cb734a/migesegifuriz.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/np24423lvh6j2ftbjrfabep9v4/givibikidevesobakitegire.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/xuluboxixovov.pdfIn PDF document text
    • https://mmszke.hu/files/file/jotabupozobopigugetoge.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/7c43699769f1d65aa0e51f561e8dc2e0/94010182183.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+can+i+earn+money+by+uploading+apps+on+play+storePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10626 11288 bytes
SHA-256: c108a4ecb57f0a07754fbd1a06fa17a89ad57c91ef11c8a27d3dadd20f5ae825