Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad58b451737adca…

MALICIOUS

PDF

85.4 KB Created: 2021-06-29 18:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5ea6885ba60d85f2b478f1b0f518f587 SHA-1: d8aa7e91e2ca8443fdcdc1ffdc519a1bd8dfa384 SHA-256: 9ad58b451737adca52ee12fb9b22893d7353aeee7f309a38434b609e3f84bb5d
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The document body is unreadable, but the heuristics indicate a high likelihood of malicious intent through external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a0ba3cd4a---xuxotezinowetemeninavasem.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/f7d8a73c7ecbcd659012b1a5ec4f720b/nasunelomobiworidodanum.pdf
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210626123356.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc62eb61f1---sasurewobu.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b74dc4859e1---soxawapelaxisavajagin.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a273b907f6f---53605985041.pdf
    • http://drthchowdary.net/userfiles/file/rilezasugoguvuraguguv.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/54cf8f14d2379b127c78e5fee2e4b84b/71775487368.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a090f5d700---fasilefiwowelezonaxu.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/mav7uvtm2a9m6nqo7cl6lbt9m3/fonepi.pdf
    • http://chokmanee.com/userfiles/file/ribosubetajeliv.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3322757a4---pofapimekofosifa.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/446e7d77113a809684918ea1a215172d/3554280073.pdf
    • http://styropapex.pl/userfiles/file/puzof.pdf
    • https://abeess.com/userfiles/file/norogizu.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/vc10e3e9uuejvjdecea0ktird3/34847115275.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/0ba4d2b0bd17574519d4591705bf83be/96576140327.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8d0985dbc---77995316077.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c71cc600ce---mifojepi.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6c9da3254---kikarubukogukama.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/jo41rn6nhrt32qedgp40qtac10/36597112109.pdf
    • http://atthaya.com/file_media/file_image/file/mamemagadijunu.pdf
    • http://grawerlik.pl/userfiles/file/49475380228.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=legal+foundation+of+values+education
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed38.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED38 16792 bytes
font_01_sfnt_off0001054a.bin
2cce4fe49060f517a732375b1847932115bff4c32966391897280cb86347651f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1054A 16508 bytes
font_02_sfnt_off00012ff9.bin
3e88f4a07250aa3eaa1f6d38844871a892dd20e89e5e1d2f9cfcb0fd71fdc09a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF9 10672 bytes