Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1843b1ed05091f…

MALICIOUS

PDF

78.9 KB Created: 2021-09-09 16:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 55b06a9cdcea4b453844af8b51d598e0 SHA-1: b7cdad9881831bc348e662f77ec5f3b8e90c6268 SHA-256: 5c1843b1ed05091fabd4c2e8b27e13693ea91c99a55536b55d5341c8aa7f3126
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan. Static analysis revealed numerous embedded URLs, many of which point to compromised CMS upload directories or are structured as link farms on disposable hosting. This indicates a likely attempt to lure users to malicious sites, potentially for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2676

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 https://rewaqousha.net/userfiles/files/65282355028.pdf In PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/b7cc251f0035714cfadcaec492382e27/tolawawexodele.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337f687f39a---87514870913.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/basuruj.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/9ee27192243ee9dd5112ddf4af75295e/76942145683.pdfIn PDF document text
    • http://konakelektrik.com/userfiles/file/pefekifepegazafejanixap.pdfIn PDF document text
    • http://unibeauty.com.br/ckfinder/userfiles/files/94807405056.pdfIn PDF document text
    • https://kawanmto.com/contents/files/xuwomu.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/45011680837.pdfIn PDF document text
    • http://mopron.ru/upload/files/87082073924.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/wapowejefivawoweduvum.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/20117767826.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/7398044573.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/tikonopujukiba.pdfIn PDF document text
    • http://www.autoservis-hubatka.cz/admin/upload/ww/file/34377686313.pdfIn PDF document text
    • http://inphilong.com/upload/files/27279191574.pdfIn PDF document text
    • http://africareview.in/userfiles/file/dikubisilizafa.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/80879463153.pdfIn PDF document text
    • http://www.poliklinika-hb.cz/userfiles/file/vojidukaxaseti.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/bb0aba21ebabf6d01f6bbcf6f821349a/konomiw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff7b5be184---wuvufigi.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/momojibi.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/83304111683.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/53037079549.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/43361283794.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/81690398452.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+art+of+loving+pdf+free+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC58 17500 bytes
SHA-256: 64650b5f190058ac8486dfa7623af5c47dca171c24eb3a2a38079f4fbcdc0f77
font_01_sfnt_off0001190f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.