Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9569cef018e750…

MALICIOUS

PDF

84.0 KB Created: 2021-09-18 01:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: faa762fb87a639f6b1cff6fb5c7b09a2 SHA-1: 71c69e5c2c0ed88b83ec809b98150fc48c1e9870 SHA-256: fd9569cef018e750dd24fa895c4c6fe0da294824b14cc963602c5ad0b6a82f19
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • 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://tg-focus.ru/userfiles/files/guwipodemakalofasod.pdf In PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cec7ac6c1b---60000753831.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/fokupewipasa.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/161422a765615a---78713606828.pdfIn PDF document text
    • http://lycee-elm.com/userfiles/file/57895600506.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/60926439401.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0cdb659c6---navejojaraxi.pdfIn PDF document text
    • https://berbagiangka.com/contents/files/59835623828.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/63398513860.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/lafofejif.pdfIn PDF document text
    • https://desco.scp.hr/files/zorekupowab.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/pujirisarabelisukefiwiwi.pdfIn PDF document text
    • http://cuanhuadanang.vn/uploads/image/files/paxavomovopobuwa.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/jepaluv.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613445fccb621---60168186383.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/35984543998.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16139eac33619d---nivorelajokuzivi.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/25533989752.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///3302052959.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/70603524954.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/nivowogapivimamoge.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54725876808.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/15417713410.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/figixogi.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/44028082035.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=sistemas+de+transporte+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_off0000e33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33D 18192 bytes
SHA-256: d5c380d07689fe5cbeafbf581efb64be50c8beabde0243b98eb51a89996e69fa
font_01_sfnt_off00011191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 10688 bytes
SHA-256: 2aa8da1caf85b30aee3f845a06771976d0664770c01e4f581f88b4df308be2ad
font_02_sfnt_off00012a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1