Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48f25c252003b94…

MALICIOUS

PDF

89.1 KB Created: 2021-07-31 06:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b9a8c4c37b2a01be2b65081581270107 SHA-1: 6fea164281294580d8701f0374f8c6698f2b7572 SHA-256: c48f25c252003b947034b3d361760a85d65e180b68d8bf6699c72a7f85a42a4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to malicious sites for further exploitation or credential harvesting.

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 http://airconbank.com/upload/fckeditor/file/veminizujalon.pdf In PDF document text
    • http://watsonwilliamsreunion.com/clients/82103/File/jegonefuz.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/fde290195a582f5a8028285ab1a670b8/62492848267.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c22b11712c---wunojawerodu.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/72445061967.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/zevamajatusupopezulol.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/25atrtvcoelkm8drekqk1co4o2/7062821518.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///bikumibi.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b4444ce1b7d---18168073855.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/pvmcn3efhtde78a6knb271ff88/pupogovizok.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/kugisifutunif.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160ad412dac52e---75424972689.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/menojeruwabeporamimave.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/nowinexesegevuzikadanag.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/e1a495dc0b71f4c2b60b2c2046b9109c/21937375250.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/161008b94c6846---22258075669.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f7e5acca8---gutojudibinatutodurabepov.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/sevokonerapugumevu.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/77199810022.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/5d180d679520d68b071122248cd00d4f/bitubujujalozu.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/xovasifipen.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/modenil.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/92af75da0d263eb5d1eb4973d2b3a135/dijugi.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/vgqk3u8do7756ir24dtojis9o2/xamowo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+make+dunkin+donuts+french+vanilla+iced+coffee+with+keurigPDF 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_off0000f3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEB 18116 bytes
SHA-256: 0bb71aa1a8eb1cd3913efd0f1327bd9f09ace3e42c40c9e816fe239d4e58247c
font_02_sfnt_off00013bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBF 11260 bytes
SHA-256: 424e095800382fdebb8dd516178b0d323e00d9bc3c73932b0ab32bbf22bab595

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