Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d2a637e52b137c…

MALICIOUS

PDF

73.7 KB Created: 2021-09-16 23:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 05e51a1b887f54e20876b8dd06e726df SHA-1: b98c3a69bc3c86ca602add31b2cc7e9efc8b4683 SHA-256: 56d2a637e52b137c1eb36bc21797b1a170793c0340aa5ce2ecfa937009f482c5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm with multiple URLs pointing to compromised WordPress sites, suggesting an attempt to host and distribute malicious payloads. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6968

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 https://radmangroup-ye.com/rgfiles/file/95416040586.pdf In PDF document text
    • http://motolargo.pl/userfiles/file/tazitagojojelawejabemufuv.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16138fc845fc26---97616110568.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/bixez.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f6788bf4b---25012966249.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613697c4b1cf6---82000987044.pdfIn PDF document text
    • http://generaldistco.com/images/file/96991088442.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141c288de975---datudujetupefad.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/c34d5ef535b85a28c9ef2041c7e8c438/getabulojekusalokejax.pdfIn PDF document text
    • https://almentispharma.com/ckfinder/userfiles/files/funuxonogogizezetebafaxej.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/96259661842.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/76828605383.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/48692677153.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/sipomolanivavuvigufameber.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/64675783110.pdfIn PDF document text
    • http://maturitni-ples.eu/UserFiles/File/50487027155.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/junamogodezidebikajak.pdfIn PDF document text
    • https://airshow-bg.com/file/lututatopinasej.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/77371558961.pdfIn PDF document text
    • https://computerzone.pk/file/lupewenixugako.pdfIn PDF document text
    • http://anindecor.pl/files/file/dubulinow.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/23063960102.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=efootball+pes+2021+mod+unlimited+moneyPDF 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_off0000edb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB5 11188 bytes
SHA-256: c02d120e88b62b45c0d09db25dcae6f38f7ea720f04c6900990cdbadb067c452
font_01_sfnt_off000107c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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