Malicious PDF — malware analysis report

Static analysis result for SHA-256 f098d7e67d8da333…

MALICIOUS

PDF

87.2 KB Created: 2021-08-30 20:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: cb7c97149baa9d6e565b8dc052a9b9fa SHA-1: 36cd1e367d70b10ae874701b12737c1f57b4111d SHA-256: f098d7e67d8da3338283a368f146f321b033d09ae9472242eace08075007893c
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to websites, many of which are hosted on compromised CMS platforms. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65949d20f1---14732814364.pdf In PDF document text
    • http://palenice.net/obrazky_clanky/file/visadikavupamagome.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/b7c580c20fa31ba2ac013f6fa2940970/fisifig.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/m7t05om7bjhtenvhvg4v876msm/giramonirotumugewab.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/kupizojixetajasezasugile.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e25bd0417---18895407882.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/d9fc20b9833830bf7349ccfc6bdcf393/vigaluxes.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/movalugevanonebasa.pdfIn PDF document text
    • http://mamtaniketan.com/userfiles/file/73152450002.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609682e72f242---88181431329.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/8d960e5f14e5409e550dd9da5ab830f5/65840104638.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/2c542ae36c045a5dad0d9f4eee76fd91/5730510145.pdfIn PDF document text
    • http://12shio5.com/contents//files/70229288021.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609939c93f4cf---2028856077.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a409d0bede---78100821280.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/tomiwaxilovirojupafura.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/samuso.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/qdkpgnkpjn640oh7ucdnb90sle/98685492672.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/vajawox.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac81d77567d---68491072437.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a3356cb9ad4---83755291159.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/fe844a61a106527c540ab365f8831771/65735380951.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=best+site+to+download+any+book+for+freePDF 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_off0000f020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 17488 bytes
SHA-256: ac74178c65b4e4c43aa92c7207752c180f193fa185d9c0651e00e1a23d9087b8
font_01_sfnt_off00011d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0C 10832 bytes
SHA-256: f93dbfe16ae16b1a5bf23c18cccd83a0da4ccbc77c0c0cce6881fe677e21ba1f
font_02_sfnt_off0001364e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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