Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf8c65bcfb534c8…

MALICIOUS

PDF

87.3 KB Created: 2021-07-26 02:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9d59686453990a7fb4ac0815784a342b SHA-1: 3280968ea73d847aa92765e68e0687d523c18608 SHA-256: bdf8c65bcfb534c804a017a7278aef35a486be336de5a18cc69206b613cb29d7
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to compromised websites, many of which are hosted on disposable domains or utilize WordPress plugin vulnerabilities for file uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/jf304sll37aq69lcrajk2ld5cq/kokop.pdf In PDF document text
    • https://cottonweb.net/userfiles/file/peretuzokekafotutikafuram.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/nigedomexoni.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093a718611d8---40740268100.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/pisubivuledodolese.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210614051741.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/976920c3360363dc1682f9ef820079db/52667739200.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/5ce9218be6d44ceb634b5276082212db/tewanezenomepexabawubuzud.pdfIn PDF document text
    • http://akssert.com/userfiles/files/47905784511.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098eafbb7fa6---vomelonexuba.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/724bd1d96e79a9c89763e18887c2904a/pajelex.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/dusezilekevuroloso.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/62534659255.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/5131319334.pdfIn PDF document text
    • https://samtee.com/admin/images/file/fukubozotuzonipexifudap.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f6b59dd385e031aeb08743c32a47c478/pesazonizololavusikekibe.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf9891be7e---dilemiru.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d431a060e2---11238994775.pdfIn PDF document text
    • http://sam-global.info/files/file/56527878383.pdfIn PDF document text
    • http://kasargod.net/uploads/file/61775834949.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/vuvekonesepolebufajer.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/849119279.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/64621687669.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/vutegulujujimajubesegat.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2d0571596---jowedomekuwovixilagixifuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=adverbs+worksheet+for+class+5+with+answersPDF link annotation
    • 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_off0000eddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDD 11072 bytes
SHA-256: 5411e74546ecee76f71c0ba1cdef4adbe59c34f31e3d95642748cbf798ef15ee
font_01_sfnt_off000107b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B5 17440 bytes
SHA-256: b43bee89fc269757af2243167e79fed68abb36bdb11a356504a9993929c2c7f7
font_02_sfnt_off000134f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.