Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd5d14fc7759735…

MALICIOUS

PDF

106.2 KB Created: 2021-07-15 10:38:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0307eb7d4f40158352b2f919384ec4b0 SHA-1: 9ca3807261b931728948d34f229a1e7d8bc1b310 SHA-256: 3bd5d14fc77597358641b31175d5cc3ca3efd706adff85a7fb0224f6a72b6b31
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of an advance-fee scam, containing language related to lotteries, prizes, and parcel delivery. It includes numerous external links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a lure to initiate a phishing or malware download attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://crewmak.ru/uplcv?utm_term=stress+quotes+funny PDF link annotation
    • http://botosani.ro/img/uploads/file/modedibixigaxoro.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a346911e279---96503058790.pdfIn PDF document text
    • http://arslanemlak.come/file/69777856472.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ac285bf90---pebixudog.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b6cc8bef2---bulalobojuvipi.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/53h7q0squorvt4bkmjmqvsl2ci/lomubotizitek.pdfIn PDF document text
    • http://allasclub.com/campannas/file/makuvatusifokusaxukexo.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/3q7u8i7v0j59egi3aoq00qf3vn/92730846390.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/14156547121.pdfIn PDF document text
    • http://diclenakliyat.com/userfiles/file/xemugojov.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/roboxazapodivelitikubezuw.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/95694581c3f53f85a4982186e8f5190a/805772617.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/68758765307.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/jonelepujadifira.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/qde3mo37m955rnh7s556oa4f26/wujufusaxofusirusozowat.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d52db8a6e6---14316569706.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c218f0d9a2e---soniva.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/48bab189aedc29a5fe56eda24c58d86c/69665570135.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/1a24d43996de1d3c9a6cd25e880568ef/lusajuwisifusewagisevil.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/a24c42146f415fd136db2b565003310c/nozojuxufemuju.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/48848527082.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/b4b5463413be32c66dbef86545fe25b2/xinimafitukad.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/24671804934.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd80a225ce9---rotukunolijozixikop.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/tedapuwepewo.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16089e7a1b3a69---ludolizugefufudi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9C 10340 bytes
SHA-256: b41ae6d825190539500771676a63b3b09939974846f426282a72cfa0a3942950
font_01_sfnt_off00015625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15625 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E37 17524 bytes
SHA-256: 396c39e4a8fb00bab6f069d5556313463b6ceb506594e5f99bbd2bf880a505c3

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