Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ae27215b568f35…

MALICIOUS

PDF

76.2 KB Created: 2021-06-26 01:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4c30cd8cd622f5785cfbae61802f2eb0 SHA-1: 0e22e071d8fba946ad11bfd70a1c6d09ed6d935a SHA-256: 44ae27215b568f35b435856719fe790e659ad15ad93fa3537162ae62baf7e2c5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a payment redirection lure. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains, suggesting an attempt to distribute malicious content or phish for credentials. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this. No scripts were extracted, but the overall structure and heuristics point to a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://queure.ru/uplcv?utm_term=accounting+for+banking+companies+pdf PDF link annotation
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/qoii38d9ih8q90n5qioqpu0ouf/kagemezesuzimevabolebal.pdfIn PDF document text
    • http://planetamama.ru/files/file/parilusamo.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/vedejekofisaxegazar.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/xaruder.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c79f8f39143---78788940836.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075786475a69---52889753632.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/2kne1vudmphttudjr69e7edkf5/xerizijigum.pdfIn PDF document text
    • http://valaptop.com/ImagesVA/file/tokatov.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a12bc01c5---zibunisoxotalukiwuwarokep.pdfIn PDF document text
    • https://werbemittelag.chupload/file/68854379263.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0eec29698---pepozatebuxezobi.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160718c5530af9---jufutukexosutenagef.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee9f7cdc58---xazamagovolurudepemogib.pdfIn PDF document text
    • http://gtshotel.it/images/file/79373312506.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/93247034056.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/07db233afe0001444f883e9785d7f8d0/120543109.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/36332409043.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/narulaxusinemadagakapul.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/foxijaja.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/89588593883.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210612_D654758D844BEEE2.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/a2e0648ee349b08faedb0bf9b97748e3/51681826469.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/33737211647.pdfIn PDF document text
    • 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC605 16052 bytes
SHA-256: f98cb0df44519e43660a05f7389b10788a2c257d8d60b7404973984c27a26391
font_01_sfnt_off0000ef71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF71 11232 bytes
SHA-256: 70453fc249413f6953ce7afb7b3f24523655181fc641c9d10ca41dc51cdfafb4
font_02_sfnt_off00010974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10974 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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