Malicious PDF — malware analysis report

Static analysis result for SHA-256 312e268070f54366…

MALICIOUS

PDF

68.3 KB Created: 2021-09-13 21:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 343f9a419fedc3ccb23c376429efa7bb SHA-1: c1cab19a9a0dc90ada5427d37966eed17038bce0 SHA-256: 312e268070f54366b36cb118010e2d5a3576467b85172133e3c53482f642bd70
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting it's designed to lure users to malicious sites. The presence of algorithmically generated URLs further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9172

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 https://inwebjor.ru/uplcv?utm_term=coordenadas+gps+android PDF link annotation
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd5fd15c19---51192214637.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/27035254292.pdfIn PDF document text
    • https://raljob.com/userfiles/file/8663955151.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0581e0d4c---lafovufivaxumavonumefev.pdfIn PDF document text
    • https://strategieb2b.ca/userfiles/file/gisuf.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/38048550855.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16133f2477fc22---senodusetekemarop.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613728a05b243---54141243094.pdfIn PDF document text
    • http://mousike.it/img_ins/files/60331231758.pdfIn PDF document text
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/mozemitobiwidexufo.pdfIn PDF document text
    • https://hijaulumut.com/contents/files/67757494220.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/23094878671.pdfIn PDF document text
    • http://ng-sons.com/userfiles/file/fezigat.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/xiledeketoxonudezuf.pdfIn PDF document text
    • https://palet-school.com/files/files/55814431435.pdfIn PDF document text
    • http://scro.ru/pic/file/1745944643.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350c68eb7b4---wimadatikirodafofevi.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/pegowobovep.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/fogigikorubasul.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/vekakamakotixe.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/2e7ac7e9c713c6568bd1ad768ecfa909/92862989249.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBC 16948 bytes
SHA-256: 2a7222189e502edc44ca9d8fb2da1d67ac5e8f49d276b334c6ee0e84c7459246
font_01_sfnt_off0000f892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF892 10452 bytes
SHA-256: 9af381d2b9ab11787b43cd96015562c08ab967d68131a5dc1f287a17252cfdbc

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