Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdec6d8fb7508af…

MALICIOUS

PDF

90.9 KB Created: 2021-06-28 03:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d9f93bc77c801a1022c7cafcc02dd36 SHA-1: cd172447376eba5b6c1b7621d6480791b7662d3c SHA-256: ebdec6d8fb7508af4435074d6b88621f57e19994ef7376c2751b51a99ba9664b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and link farm behavior are indicative of an attempt to exploit users via malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://otoozevran.com/resimler/files/tudejagamoti.pdf
    • https://vieclamxaydung24h.com/upload/files/94385756314.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a12c3af70e---94003287436.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/sep5un27jbu3q5qm99ehf0khe0/8005705862.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16087217119d50---bofazetepusuragikel.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/ebbec7f00ae8f86462a730209d59278e/pofedu.pdf
    • http://cn-junsheng.com/upload/file///2021658861326.pdf
    • http://proxima-design.cz/files/file/tovuvigefojep.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/6kql7f710tppnpua6vopsvmaah/41927435491.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ff40dc2e0---48039081008.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/nifute.pdf
    • http://fizjoactiv.eu/Upload/file/vededefetavatulivop.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e306bb2aff---50986517918.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/a8286f7407880cbc0c0cdb5419044c8e/85197827156.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099bc8f8da18---jurupugodutevaxijibusag.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb538628ab---29023283409.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d319c0015---23984280955.pdf
    • https://bistakalikotenetwork.com/userfiles/file/69974260935.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9a9afc485d5e7de7f15356035cf83a0b/96635280876.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/eshighvk71kghucp7gj4phqo72/62899015721.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/19fbecaa9a9fc6f80a508afe8554d705/71225083131.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160afbedc47ea0---ximurenizij.pdf
    • https://fceresources.com/ckfinder/userfiles/files/11290720456.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=calculate+stimulus+payment
    • 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_off0000ff8c.bin
3e87eb2f49d33fecb796fe13d3f47e75786c507ec5763fbb343d8ecd57117559
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8C 10560 bytes
font_01_sfnt_off000117a7.bin
500d91f319d32d8c3f620d7c8cd9e2aa606395e21e64ab2b846703521d01d74a
pdf-font-stream PDF embedded font (sfnt) at offset 0x117A7 17700 bytes
font_02_sfnt_off0001465f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1465F 16792 bytes