Malicious PDF — malware analysis report

Static analysis result for SHA-256 1336fdd124cd3310…

MALICIOUS

PDF

88.3 KB Created: 2021-09-19 00:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e191a8db19e49d690d41546ddfcf19fb SHA-1: 3322762d19be25abb6d0ae3f2b4eadf967e41d07 SHA-256: 1336fdd124cd331060a368aa6ad54dd7a908b2c5d711f42f94c639a4846feeb3
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://laborke.ru/uplcv?utm_term=ink+inc+tattoo+drawing+apk PDF link annotation
    • http://ville-dammarie.com/ckfinder/userfiles/files/fowipirizutedakivubujo.pdfIn PDF document text
    • http://domkomplekt34.ru/attachments/file/benefow.pdfIn PDF document text
    • https://jagominum.com/contents/files/nagofi.pdfIn PDF document text
    • http://bacsiha.com/public/ckfinder/userfiles/files/kapedobunudujota.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/9103363897.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0133c2c98---57296655001.pdfIn PDF document text
    • http://fst-uinsu.net/userfiles/files/zazadeguxenedojuduve.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/ruwimafasijumefimuto.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/gojivurujebaxemut.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/55084672727.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/47041112060.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/veralakopazut.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16140e1cff2105---zepaxokubev.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16140c81f08e6f---11206262075.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/guvafaj.pdfIn PDF document text
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/gezeromaninatuzolalabopo.pdfIn PDF document text
    • https://rotterdampools.com/contents/files/40512561504.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/tozukavo.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/29767294518.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/84325821722.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16143eaa4b28d2---wozoliduvelikavawig.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/tevumagevu.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/36794572533.pdfIn PDF document text
    • http://irodaszer.lukinserv.hu/file/95443531875.pdfIn PDF document text
    • http://budropol.de/Upload/file/16628171710.pdfIn PDF document text
    • 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_off0000eef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001070e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070E 10472 bytes
SHA-256: 0f5515d9cf42812b1756fa021cc06f6c83def2910162c3e830523728d3910d6b
font_02_sfnt_off00011ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED2 20112 bytes
SHA-256: 14a33f9dc2e173ab2888c6c07ecfc48ff7794fe6bb6d4f4767988f865f8fb4ac

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