Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c2003b7bf785dc…

MALICIOUS

PDF

87.3 KB Created: 2021-09-08 00:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 80bb017622a7fce6ae4634332d4287ab SHA-1: 9f469bd785d626b18c9f127ddf1baaca4ded3c22 SHA-256: f0c2003b7bf785dc2b730407d58d833dcdca4e8c3c370ba3313608c3ec4d9ef6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, including a compromised WordPress upload storage, suggesting an attempt to obscure the final destination and evade detection. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing lure or a downloader for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9731

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca3d22071d---29999608020.pdf In PDF document text
    • https://keongracun.org/contents//files/74224226240.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/48535053840.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/logufewejiwirebelelugot.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/89451286697.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/84173155464.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/joxadiwuvosuwoxuwalanodig.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/venaleruruneruremijizizu.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/vaparuxazerilesajajapig.pdfIn PDF document text
    • http://yongqingtech.com/d/files/85636677437.pdfIn PDF document text
    • http://evansmedia.ca/userfiles/file/sutafekamipuxoto.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160fe50df32d7b---danuvufewojifazebed.pdfIn PDF document text
    • http://phpirateboosters.com/clients/867602/File/niluxopazewolafavitages.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/nifafugetimug.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160717eadd9c07---bibilajiberizigome.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/35ffff407befb0b9be6eb240f7b8d622/39333757188.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3976fa3d9d---gijexiba.pdfIn PDF document text
    • http://kme-kme.cz/files/file/55488918434.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/tusagipezozepazawexexulox.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/xudiwosulikoxi.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6811c06d8e---kexutarorumiposoje.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/4be11a28f87bc90dcf1a92d8b505f13b/dujevixipiramabifero.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/zabexaxo.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gamiligasomemo.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/2dfnehn9ah65gh55fom0o31k26/muwadojuzanatolopirumiza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=double+meaning+words+worksheets+2nd+gradePDF link annotation
    • https://mediacentre.heathrow.com/js/ckfinder/userfiles/files/89863382538.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000ea8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEA8E 18136 bytes
SHA-256: ba67a163e9e6a8a017548b1e9d9eebd8754d932a62cd8d1625a48ae292e4ddfa
font_00_sfnt_off0000d091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD091 11232 bytes
SHA-256: 9304755eb5c0cfe838511c2b623ae3a60f18bd27825c42b7f281a2c561be5a3a
font_02_sfnt_off0001076a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7C 18072 bytes
SHA-256: 3206b7a61de990f7c98f61224682dd4e1e39fde33d5f38aa26e1d68608010b7c

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