Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c90d7193c5b15ec…

MALICIOUS

PDF

126.3 KB Created: 2021-07-16 16:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7a6e9eb37eb7a59017c5b018c26c490e SHA-1: 1e891d3b126be73c3124efd3c8e4d443db642ade SHA-256: 2c90d7193c5b15ec1e4f43cd50066b9db77edd20dedc22f65034ba9186276334
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of links pointing to compromised WordPress upload directories, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure of the PDF and the nature of the URLs point to a malicious document designed to lure users to external, compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6485

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://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/a4d2be4adcba37893042d9aac2645f33/11137802554.pdf In PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/bafutu.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/olg8o8n21dk4pvbv07l62g60vo/95096235191.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/32676339682.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/65872170462.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/9693ecc2865683a83bd4aa2eecb2d025/13585644565.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/hk4nearvho2du7egmv0jfiq6t2/xixilizegojonorojagelaga.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/pebojavoxuk.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/18d280b4f404912032673dc2add5aa91/fowurerilajovaligojepozim.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/dugekopededafoxezupe.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/ruzebatafafofopizifo.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/kanufupofitixifalepen.pdfIn PDF document text
    • http://raczcsalad.hu/files/10347114327.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/gadarum.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ca9ce0c13---23215914134.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0e4405396---87284509162.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/pafefetefebulijuripefefo.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/89229528026.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd07a42a9a9---futejugutapowebatovew.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/nukeronegibisofumazewasen.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/27a7sneh3obo5e6c5d96anaqn6/mipukibajekurixe.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-7-5/20210705221007235508.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/1f953ffacfa595eb7bb326048d42c155/15399376835.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=brain+mapping+for+color+blindnessPDF 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_off0001c991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C991 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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