Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab200ed8379ba5fc…

MALICIOUS

PDF

58.1 KB Created: 2021-09-05 10:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5e39c14110ee34c44e7bae260b90cd16 SHA-1: 10ebd951a5615a091a2cec503e3a2a3eca2bf8b6 SHA-256: ab200ed8379ba5fc969dd161b5c8665761527e2d0a39317cccb42d975762edaf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further support its malicious nature. No scripts were extracted, but the structure and URL patterns are strongly indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8244

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://cructi.ru/uplcv?utm_term=lspdfr+mods+2018 PDF link annotation
    • https://cutandcolorparrucchieri.it/file/42211730098.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/jegodugojakirit.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/5215dc31b8508881382f14e0a84b7606/99032754965.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210617_8DAC82B0C60BDC15.pdfIn PDF document text
    • http://schokobrunnen.com/idata/82729910031.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607919cc52cef---taxinemeninekikigefoba.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/61cc09db9761841ac2f2481d5c8f237c/natubotisigeg.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d725eb98ff8---garanonuzefibudaxajazo.pdfIn PDF document text
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/69444052935.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/juvazegeguba.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f7d4271a146---87944808939.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/49672189357.pdfIn PDF document text
    • http://waterreducer.cn/d/files/66738755654.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/0p2jhau7g6j991ibu9e1jqbe3l/xeripajipifizo.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/d4b77e8e0b4bf506e33ab03efaf6ef20/6893133136.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/a6ae5b1d7b0f2e6ba2b3efa8f87e70a0/wonosus.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/a4ff3c3bd544dc04f99737eaf4ab4dcb/59101338145.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/98bo4fdlreim6ild96e3lkh0at/91726717587.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607d168d6f6f3---12986659159.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210903101350.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/360160968.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9fe677fb7---fixokebopun.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/nifojuraku.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0193c1928a---zokagaruxigulotiwimawidow.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/64149232860.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB6 10484 bytes
SHA-256: a8c58dce359f89b9346dfec7ad803adc0ee9f497d5944fa3b2a9e7ef4df2bea2