Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f76a1c148a45656…

MALICIOUS

PDF

92.9 KB Created: 2021-08-17 00:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fc83d8d68cc9dd303854bb99bb395617 SHA-1: bcfbf372698f9c1f70bbbafd6d8650be1b73c23e SHA-256: 7f76a1c148a4565692d1fc0e656df69687e8a158c9fb2815dc6055171406496f
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3248

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://tevukasveza.lt/ckfinder/userfiles/files/80235359363.pdf In PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/57093537063.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/26504611223.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df993c21c23---verigupujafesiral.pdfPDF link annotation
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609467a345df4---dazosofofotabip.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d35bdd589---80807090963.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/13711204940.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f67caa324---29417636121.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607834c60fb08---71022313760.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/6e99d6e7a2a0aaea2e6f837affcff88b/16164891217.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089b308c151e---32057298305.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/71548452200.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/lolekasuwupaxufadanamumif.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/88771156705.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/dazadoxotaw.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/27333156818.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/1874645781.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf6d1f264e---mutafokusuwilarolezuxem.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/67182017170.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/13142511060.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/befigava.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/10950245688.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/wutoguletugojedenirawaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=addis+ababa+university+accounting+researchPDF link annotation
    • https://mediaget.com/userfiles/files/95716196443.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_off00011843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11843 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13055 18196 bytes
SHA-256: b0381e6d8112f059d30d6bef55d90f85f1e64e728244b2a31eff9e360b9f344c
font_02_sfnt_off00015ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA3 11004 bytes
SHA-256: f46aa668c978f97f296c18a03736d88320e39bf41f9512cc3547739e54f4a6f5