Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e8533a5d90b7dd…

MALICIOUS

PDF

62.6 KB Created: 2021-05-12 06:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b6a36e7c2f993005bf342e1c6546408 SHA-1: 3ca5f3fcb8195435f6bc7bedcff0eec5b2bfdd5f SHA-256: d6e8533a5d90b7dd7186b42ef58a91f1869bf1d338b24b8109edb74ca362fa7a
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to redirect users to malicious content. The document's structure and embedded links suggest a phishing attempt disguised as nutrition information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8574

Heuristics 5

  • 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
  • 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://pet-fashion.ro/mm/file/68916243341.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/90fhkinoine84sr6hqtueraddv/17742230627.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772cff42aec---wenemaxopugezagaravur.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160745635a7f51---taxawopekovesogupujesap.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/5b4397ab84b8f30e342f96baffd127b7/repakimefo.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077b71c2d1dd---gopagipimuzomegefitanobe.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/uf6ueqbjajec1hfa26e1qvq0n7/takifawatolim.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072684a446f3---falonatasowajeso.pdf
    • http://atek-ent.com/upload/file/pirigupaledinonejumad.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/f8b2ad4a7f8c8dbbf81aeb7ed97569de/dogulugosorogedalorad.pdf
    • http://jjmcp.jp/userfiles/Image/file/49747232806.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/46f5aecb67adb5192b2d5775d3476b1e/49115792217.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/t3692c5h729dnro8vsbtcj3cdg/jazapetanotutemidamom.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090df5c10c15---rixefobiraduvevu.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/4n4b8jf467djbf4j97s69lliq4/vuravuvularejedukuton.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609070aaad948---wigilebofiruwurunidadimu.pdf
    • http://meble-tk.pl/userfiles/file/jimosonorewoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=cupcakes+by+melissa+nutrition+information
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbcb.bin
bd61a06b87649fe062fde3f52b7dd9095f716a9a2e3d1f93c2bd3000e166a160		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCB 5372 bytes

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