Malicious PDF — malware analysis report

Static analysis result for SHA-256 3764cf12b49abf96…

MALICIOUS

PDF

104.1 KB Created: 2021-07-27 12:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b576c1617f7a5317c7eaeef9bdece57d SHA-1: ee4c1eefbc292690f35b82492bc8815263bc4c43 SHA-256: 3764cf12b49abf964a02054421de0bc8912ddc08c4eb2d2047a7b61d2f93ac7b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to various websites, some of which are hosted on compromised CMS uploads or disposable domains. The embedded URLs suggest an attempt to drive traffic to potentially malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://kartelabasligi.com/images_upload/files/sawiveliborevuzafab.pdf In PDF document text
    • https://weborder.cloud/userfiles/file///kaxiberidividomifolaz.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/limakadugopo.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41366238012.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d4fdf79dc7d---vumeruporewabatikosemumo.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/u2ul6bb4qj5fs0t6mulf5tvh86/mazukizup.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079371863e6d---zexolavatebibefaserurela.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021071002125818.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/15890131572.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/69319456294.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/7433a0d651e1e9792a5a766576d0a19a/xunuku.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/fijopoleloj.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16098315c4cbb4---pibabesejotunoxe.pdfIn PDF document text
    • https://peterdegendt.be/file/48433070280.pdfIn PDF document text
    • http://tuhs1970.com/clients/a/ac/acc339db084e87cdfae31a76a6c96f1c/File/5959081167.pdfIn PDF document text
    • http://altronic.pl/!mag2011/userfiles/file/joreforejuziguwusiza.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/llifrv700fg10a39q0d4388rps/13373714655.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/loveb.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///30347668533.pdfIn PDF document text
    • http://chromatographvials.com/d/files/65996513239.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160743f5661fd6---tozegusajeruwidutuja.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents//files/begafevogi.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/6176988485.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/7r8088jp02v32nuttiap5mqpds/66887961117.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=novel+the+hunger+games+bahasa+indonesia+pdfPDF 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_off000132bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132BB 11228 bytes
SHA-256: 0213dd3952e9c81052847351ae09af96997e810eb22b39491372388d7a2c9553
font_01_sfnt_off00014c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16486 17592 bytes
SHA-256: 01b53e2fa29230ffeb61feff91065fbb0707795f19e6c8564c1f97e31df66a64