Malicious PDF — malware analysis report

Static analysis result for SHA-256 07252f8403fea91d…

MALICIOUS

PDF

76.4 KB Created: 2021-06-28 04:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4c2b2337c3801424f0bf93e82b47dd5 SHA-1: eafb324ff1f570fdc3892de8a5e8e64af102b63b SHA-256: 07252f8403fea91d6fb5a629eabf494836f9ce09b005132d0ed7c193374bb7a4
156 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm used for distributing further malware. The presence of 'utm_term=administration+jobs+near+me' in one URL suggests a lure related to job searching to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160879d16effbd---57655804411.pdf
    • https://ayurvedaemart.com/uploads/file/jisogaxag.pdf
    • https://rcot.org/userfiles/file/pomifuwipetuzadusuwi.pdf
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/21d95178f39508f22d13155a812498a2/37420303402.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a8758f368---3850882124.pdf
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/c1293526509fa9c547333ad50483cf03/87054092128.pdf
    • http://alpha-th.com/userfiles/file/fakevuxidorunazafazedazi.pdf
    • https://houstoncoinshow.org/FCKeditor/file/63728410053.pdf
    • http://sns.hu/_user/file/93123769118.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d77684a59cd---85418290799.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/93210930208.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/fcbf595afb8268775351b690f2f60ba7/25869579669.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160799200b8b88---fenipekixiwojegulebilamu.pdf
    • http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/30312852184.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cba87c8b94---daremasomeloni.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a0730733780---sakubamelofenutesevoluga.pdf
    • https://bostoncake888.com/UserFiles/files/fapogikuxepaginegevav.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9191dd5988---rozura.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/14d0ca163e91ce637b4fadde051158a0/lupunesiwepaxojav.pdf
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/rijojowosaxo.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb4024182---10912595284.pdf
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/4c4a7f612d1ef2208b1f0df937eec8e8/33024221547.pdf
    • http://22vek-omsk.ru/fck_editor_files/files/34335559411.pdf
    • https://mn-lawfirm.com/box/userfiles/file/64064765177.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=administration+jobs+near+me
    • 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_off0000cb78.bin
ea54b4b3577515ad0b3ffb811b01b060421c59db80f74bebd2f78458ac0734c4
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB78 10612 bytes
font_01_sfnt_off0000e3a8.bin
c2e2e9de5226b3ee7b1c45528e51343722d2f4ed19199f46b40e0ba812c8327a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A8 15860 bytes
font_02_sfnt_off00010c6f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6F 16792 bytes