Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3362368ec7f8910…

MALICIOUS

PDF

60.0 KB Created: 2021-08-17 04:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b04e6e168822d94946fd1d95c68de138 SHA-1: ca4f701c1eb0cd42704c65f49333d2efcc9a07f7 SHA-256: f3362368ec7f89108b120aa11b9b92b3b6fb002fa78237375eead06a73c864c8
154 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external sites, many hosted on compromised CMS platforms, suggesting it functions as a link farm to distribute phishing content or further malware. The PDF's structure and link farm characteristics point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9043

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://mazdooradda.com/userfiles/file/rofazobi.pdf In PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/91fbb3866d052856f1af5fd640c2de32/53913360012.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878c9b83602---bipotoxonapavulubepup.pdfIn PDF document text
    • http://elma1.ru/!upload/files/35613020907.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/pvecn5nv2gabn1jhlqvt3t32d7/83963954859.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/23ledlfi2qoong2v0ukq6k4h9k/xavutevabifulazunagire.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/66056193733.pdfIn PDF document text
    • http://teaneckhs1977.com/clients/67867/File/ruxoreseridokijune.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/gadok.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/10b0ef923ee86dc1c68106811cbfd5ac/pedirowufudevuzinopo.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/polekaxalagiruj.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c409326b7---ramakinafukegab.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083051444999---86281991970.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/sujedenunuluwipidelever.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/79314366560.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/fevilazatafuxinesez.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/28313505683.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/fuvonubudososirozufabe.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a52147ac94---jivaxerofifuf.pdfIn PDF document text
    • http://princeton1959.com/clients/863834/File/73008852341.pdfIn PDF document text
    • http://euro-ex.com/images/blog//file/nizidozenanapufej.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/zefimebopuvukerafidinuga.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/3fusrb1t9g3dk18mkq4kj5aa71/kefesobakixitujeve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=ejercicios+matematicas+4+eso+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC8 10820 bytes
SHA-256: 1b92ba9d5d3cf0e7d23bebd3dd86947e41f5260da7cd22edaaf4ecdb44f063a2

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