Malicious PDF — malware analysis report

Static analysis result for SHA-256 d286d9f9578a0b9f…

MALICIOUS

PDF

80.9 KB Created: 2021-09-12 09:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e065b6ce933701f7966197b336e568b8 SHA-1: 214887b1c16b0a5b7dc38d1ba6d980628a2cb44d SHA-256: d286d9f9578a0b9fd4fc29b3e5674c0ca72d2882b9c4b3dc665da1cb884a100c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress upload storage and disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://yaqeen-eg.com/userfiles/file/warolodetiwozekotinotaru.pdf In PDF document text
    • https://togeltop.net/contents/files/32906834225.pdfIn PDF document text
    • http://aquaclub.hu/userfiles/file/26961969347.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/jodejolazeditoj.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/tiwugafa.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/jadumejisofalejukibobujav.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/4spjvdn1igrchl18d8keu02mee/wawuzekawexan.pdfIn PDF document text
    • http://cistenivytahu.cz/upload/file/kafimasami.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/52897157569.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gigenel.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/fogopigafupi.pdfIn PDF document text
    • https://pensionradvanice.cz/res/file/29094068352.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c69dd09977---88609231762.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/65097822759.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/70057653503.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b2f9151e4---kimajitaveri.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/75984276783.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/zagadiwaxuteke.pdfIn PDF document text
    • http://fthyhs.com/resource/docContentImg/file/2021-09-06/cd81cb977c12bbea3fccb054efe6bea1.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bofaq1a43geu9vlqk1cqegac91/dabuwejeselivetaniku.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/mevotijofosarolifikinexo.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/sevonakopazexa.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/40405986290.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=sweet+berries+minecraftPDF 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_off0000d705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD705 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1C 10632 bytes
SHA-256: 0f7930d0044d8954768a5f861752b4e354a642d4845f85bf4ad98dadae1d8ec1
font_02_sfnt_off0001077a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077A 17888 bytes
SHA-256: f3e445f1015e6fb12025ff1f5b4ba5cc9283770e7d591dd94c2c9da0db5f4517