Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0ea0df581035bd…

MALICIOUS

PDF

71.0 KB Created: 2021-09-04 21:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ad62be057986be47bc12524e654b3ac SHA-1: 01525818a7216dbef0244b795fb35cef9f3a5dc5 SHA-256: 5d0ea0df581035bd9e9eae48ec76316219222b48cd429ef116babf0a6e10d687
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it functions as a link farm pointing to compromised websites. The PDF contains numerous embedded URLs, many of which lead to suspicious domains, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing or malware distribution campaigns.

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://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/3c0010288ca0db07f4ce609f130fabcf/xekifudidevunananijise.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/161219c41a86b4---gonopegumobipekesilujif.pdf
    • https://primer-spb.ru/files/files/zuxoxevux.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8e8fce637---vagotuwopiwufojupubulapi.pdf
    • http://www.cbs-emballages.com/upload/file/33198713650.pdf
    • https://thietbixanh.net/uploads/files/nozitapip.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160730831dceb0---sukesosunezogow.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/ucihl0s68k6a573j2e7v6vjofl/43693484114.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608163b05dad8---81894451166.pdf
    • https://matrainagycsalados.hu/userfiles/file/94877991830.pdf
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/15399602425.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/elia09bcr10un5tk0l6i8aj8bf/jerazapojoxabonoxujim.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc54e04861d---duxurokirobon.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/nhcmconmchq0teiver5qbr0f16/sabed.pdf
    • http://kmsenior.org/file/files/dilovevijomoxevedunabiju.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/6a34517d7e4d79d34da75517c41cbb04/40679233229.pdf
    • http://aep-tc.com/cache/fck_files/file/66024843511.pdf
    • http://stark-tools.ru/images/uploaded/8160368190.pdf
    • https://proartgaleria.hu/files/files/84063307330.pdf
    • http://sumosushingrill.com/uploads/files/42485493305.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607598f5715f6---nufemuw.pdf
    • https://implant-drill.com/userfiles/file/babalirakuvuzi.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611842c66dd4d---paxejinapapolerajaw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=definition+of+theory+by+different+authors+pdf
    • 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_off0000b61d.bin
7762d5394f5bfdd5b37b4105774ac3a6e572d596622cb343a7b0071c88b55682
pdf-font-stream PDF embedded font (sfnt) at offset 0xB61D 10904 bytes
font_01_sfnt_off0000cf1c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1C 16792 bytes
font_02_sfnt_off0000e72e.bin
365f7014429fffc9e6af462efc9942c586407e618bb281f1e92f8e5da47ef566
pdf-font-stream PDF embedded font (sfnt) at offset 0xE72E 15496 bytes