Malicious PDF — malware analysis report

Static analysis result for SHA-256 fadf52d71ed90560…

MALICIOUS

PDF

72.9 KB Created: 2021-09-26 00:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 99357bbacaa17b9c94c53d728407338d SHA-1: 2d190145aa6d02f0105952b4bceefb88590060c6 SHA-256: fadf52d71ed9056003a4c880823208b9255f25014ed2af360d8b720c437c77e0
124 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as 'Pdf.Phishing.Trojan', suggesting a phishing or trojan distribution intent. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4682

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/ledoperi.pdf In PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/4254d0e5e0e9a17b36e23ddb4e1c7a29/89315683022.pdfIn PDF document text
    • http://www.ezmoving.com/file/ximiralatemila.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/30503249813.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/6c7e64cf3eaa65312eed30c2634addd0/92323131556.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/vivosabasipaxanitopodosal.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/64723685242.pdfIn PDF document text
    • http://abnigakgdsg.friendship-match.com/upload/files/6609630427.pdfIn PDF document text
    • http://bluebiz.kr/userData/board/file/jikubaji.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/17466612867.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/19afbbfac3685e88298d9dfcda469c8f/12340956531.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/wazot.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614e2206b6ad4---jemapapo.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/99636038574.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/10525547918.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/43270899507.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/pajuremuvikajimufojeb.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/fepizetizozufugudetamas.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/lumajikalo.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210913_4C7001D209B7E939.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/vakiwakaloterusojapit.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/76534139480.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/bb00ecdcb29c8392e536f4b3db82c5cc/rixanafogevukobax.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/90055842486.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=bloons+td+6+hackPDF 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_off0000c3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF5 10456 bytes
SHA-256: 8ea141cdbb3bbac55bb6f1ef68aa1c499c8443990043c6ee3730cbae90be57fb
font_02_sfnt_off0000f3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B5 21228 bytes
SHA-256: f9c6168779748c15449ccdd6aff63963351ea8fe520c4ee1d05f531f8112ab13

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