Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee406265c1b14c28…

MALICIOUS

PDF

87.1 KB Created: 2021-06-27 19:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0e91f62f7ee3bc20b91f26d0dafe5c0 SHA-1: 847cbb84c7f6257fe47dde161ca03037e4b41a24 SHA-256: ee406265c1b14c28db33c7c039e4b78865afceb7f6d7bb3491407ba70d10f15b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV confirming it as Pdf.Phishing.Trojan. The file contains a link farm pointing to compromised WordPress upload directories, suggesting it is used to redirect users to malicious sites. The presence of multiple unknown URLs indicates a phishing or credential harvesting attempt.

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://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160894d055a1f1---ziwiletel.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/dazoguvewazipateziwumura.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/3d19970bdeb32e3e6ac96f5ead493117/39756281946.pdf
    • https://aspaeng.com/files/image/files/51704127760.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/76766f0bafb594bd0dc48be91482ce4b/munopetewikibosodilemaz.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/5674431850cc450f20e24b5c6b6610cd/weweletimamuxexanaluxan.pdf
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/76579584296.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160985b380ba02---jebixivegamukasovinapexa.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dec68bc7a---87660198299.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607da949ce8a9---fapiz.pdf
    • http://kasystemofkarate.com/clients/861259/File/49952064311.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/bcb1fd232f3cb3afd91f7672ff1d0a53/nuwolujatepakagor.pdf
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/19366491164.pdf
    • http://cephedanismani.com/images/pages/file/kiriliremamasob.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/7b3828158fce904850be4af914e23eda/88395805042.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/99kl1adgk4fnhf2ipi3eu1sseg/papini.pdf
    • http://berbun.com/user_img/file/jiramuximepoxavazazogu.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/8eb15a7fdfa2a4481b74aaefd08b01d6/mofupid.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c6019f574---rigujijo.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b37a2bb6bb1---bolarosojatizow.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bef55410eb---ganijax.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c3ab349604d3ff6a2971d7df56bdc3f5/43230224080.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/nja3k036a2tpok5n9qj6dttl76/lulabumufelutajo.pdf
    • http://baaningdoi.com/file_media/file_image/file/64088784018.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f2e2474ff---28472868718.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=hd+online+movies+bollywood
    • 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_off0000f1c0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 16792 bytes
font_01_sfnt_off000109d7.bin
81f6606240d80bf5f7fd1a0115c1bc863b76eca84add42ba8b90d721dbf6162a
pdf-font-stream PDF embedded font (sfnt) at offset 0x109D7 10444 bytes
font_02_sfnt_off00012174.bin
8b5238ca916f94a2689372f9c9fade743c555159b7b2d3e40aeececf8328da75
pdf-font-stream PDF embedded font (sfnt) at offset 0x12174 17540 bytes