Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3c52e6f594ce06…

MALICIOUS

PDF

86.9 KB Created: 2021-07-07 23:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 42d2b488e52c9df55cf2fc18c35ca8b5 SHA-1: fdee6c94b672c1227989c3b5c3996092633ad42b SHA-256: fd3c52e6f594ce06e917a7f4384292ad6d1ef4777acd0deafe717dd1a1a09cc1
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be hosted on compromised CMS platforms or disposable domains. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://windfreeklima.com/upload/ckfinder/files/13964515641.pdf In PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c069434cf---52972017953.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/213ddef042817385a43686d5336f4f2f/70433379893.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/68670430279.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/62489491644.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd1ef48bb1---66112326871.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/eddkdfqngsph8r62oncud17dpb/bazalajavetusuwixoromege.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d90386d15be---lorafibitutuvibeludixava.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/pmkvvblo8gog4gj382t1ops8j7/gamipotezolakup.pdfIn PDF document text
    • http://amandamaitland.com/images/file/faxexononumobad.pdfIn PDF document text
    • http://robinsonfamilyreunion2021.com/clients/7/77/7769cd5c98d63cfb9738ae2db1c5c42c/File/33135412082.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/phu0ve3khho1hj23d5mbm2l7s6/12295449866.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/36789565331.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9634e8736---rubexotifelojubesirej.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/1akdbsbsi1k2tviav86unnfk3m/nulaturulikig.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/2d9329c1c41e0dd415007f019a173983/15661445219.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/19218950312.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/tagazopufoxeku.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160966f03afcdb---96656963336.pdfIn PDF document text
    • https://infotechbg.eu/file/30550184240.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4c36a2b57---48736966454.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/b5af46cbe6ac69db5e97433c14019638/mogamewuboxekoto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=the+mind+connection+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_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 16676 bytes
SHA-256: 03699630c30288deea814963e8ae9a20083cc718a3d48f3e4402b2272bd86a09
font_01_sfnt_off00011dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC8 10372 bytes
SHA-256: 9552c29292078a69333149f23d7d4420bdba81a42395a7752411b62edbb3b3f0
font_02_sfnt_off000134fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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