Malicious PDF — malware analysis report

Static analysis result for SHA-256 0501e7cec11afbbc…

MALICIOUS

PDF

89.5 KB Created: 2021-06-29 20:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6fa8f552092756ff39e1d7e9bd0e8779 SHA-1: 88c504393e190eec13eb34e5d5d701db5c192bba SHA-256: 0501e7cec11afbbc50267986572ea74cddad7f4db2d6e3f174f7f7e0f076a3f5
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to compromised CMS upload directories on various domains. This suggests the PDF is likely a lure for phishing or to download further malicious content.

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 http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a75be8029ef---xajamalupefa.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40c35aa7af---33897557416.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/a0rs9pr70bgosngksrr78hcjoi/89565989493.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/70a8c14ad75c6f2d1efa118968bf7e59/54129722880.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/43f8eb33eb6d8b19e9773b4b5e07f031/genojazejikikubit.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6ef5dbaf1---53142488152.pdf
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/1c55f2094d1b8fd2d30d4ea769684598/97983159307.pdf
    • http://bscartridge.com/pic/3653836830.pdf
    • http://bensonlandscape.com/editorData/file/332353019.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/c5pqrp1sqvmhgn9l5krockhjfd/zilinekuxurut.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/n3a3658umvs8c6nkuf1svqhj31/pemusujivokisadufo.pdf
    • http://mdsalon.ru/img/lib/file/89494735377.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a9573747c---wawetorunosopojekaf.pdf
    • https://amatnieks.lv/pictures/image/zikewopusizunexatini.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/vgll8u167f0fvdmk1h6lr9v855/59043725323.pdf
    • http://thingsantiquesla.com/userfiles/files/11668584930.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/22594e4d5a2b28ae27a924893bbb855c/kuxixotimebepa.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/5a05b9bf943b27df404638fe456ac591/39629099991.pdf
    • http://teplolux72.ru/upload/file/gizofugarax.pdf
    • http://poorclarescork.ie/images/jajefad.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607b07efad4e4---26067664000.pdf
    • https://actor-conseil.com/files/file/96120402326.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/d5b4b876b1f3fd5b8476ef961986751a/46790753198.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/59e1cbc2937e5ee67adfcaf6e8b10915/1543017705.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608a16fa64029---83491460307.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=the+helmet+project
    • 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_off0000fbe3.bin
0bb0b2a0bfadae8e8b7cad6fcfdc4d32fae6054c896085a69970f9ad00ac61ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE3 10204 bytes
font_01_sfnt_off000112c1.bin
8abac4ffb8cd0d4223f758a85d8dabfb1537b26054d9987ea59bef066c6b3b22
pdf-font-stream PDF embedded font (sfnt) at offset 0x112C1 17184 bytes
font_02_sfnt_off00013f63.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F63 16792 bytes