Malicious PDF — malware analysis report

Static analysis result for SHA-256 197f9d0e5ff5fb89…

MALICIOUS

PDF

84.8 KB Created: 2021-09-05 16:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b2fbd80d4826ff0c9dff7968dfa4c280 SHA-1: 39f7fe001e15192ec5199e8ed5fbe053b10bec47 SHA-256: 197f9d0e5ff5fb89cfe5efce3ee4cf55e78d824486dde1331798c6b4e3909b2f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it is a payment redirection lure. The document body is heavily obfuscated, but the presence of numerous links to potentially compromised WordPress sites and disposable hosting suggests a phishing or credential harvesting attempt. No scripts were extracted, but the overall pattern points to a malicious document designed to trick users into visiting external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://m2m2design.com/userfiles/soxepunadagawuponu.pdf In PDF document text
    • http://greer2001.com/clients/e/ea/ea56749d84c1a2d7db36d2c51c833a37/File/kefekunisodum.pdfIn PDF document text
    • http://gat-asset.com/CKEdit/upload/files/nunalibukofoxogofevasanuz.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/64799912939.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/pirigujelegulenuluti.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076495764328---nukoliperekipavunudiwirit.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075981ad64a4---zazater.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/a5437cef2b41ae6faf91df6128af23fd/zivaza.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/qr31qb2i2i0k20ko5f297b55p8/nosuve.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/mudelagivelimagirut.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/448fccb9057eea77058950dae4cdc97f/10164333415.pdfIn PDF document text
    • http://cuiquji.net/d/files/voxibifapogomo.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/vegonaxilitajuraxuxe.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/wuwobawojulexare.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d66a81b049b---xaxulifojesofe.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4404e214da---korusezobokajarugofe.pdfIn PDF document text
    • https://gadesign52.com/uploads/files/202108202256557478.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/4p6h9hr04cgve4hcevk8h2qnp5/feduberaba.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/piginujesuta.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/jukubivex.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d7dc72ea0---losasezulowis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=functional+vs+non+functional+requirements+pdfPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C8 11072 bytes
SHA-256: e18c95d47d795f0d03ed954d24c9f1f28675810a3b8952adb938ab6f1813b198
font_01_sfnt_off0000fe5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5A 18472 bytes
SHA-256: de264bb81aeb57205b0abae42080d78268c0f6f5ccb8c7f32e1809ef4f5cc64d
font_02_sfnt_off00012d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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