Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7044359081fd177…

MALICIOUS

PDF

95.1 KB Created: 2021-08-09 11:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6ffb5ee6b9dfcd8649beb1cbb27f62f1 SHA-1: fde47c4b4d5c8ff6fa12c1346386b2db0ce30a86 SHA-256: f7044359081fd1770bdee2e3a1a67463c78925055c0dfb45b37908231d6a47b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, potentially leveraging embedded JavaScript for further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/a73ac749c805ba7f2086d35e989b30d2/85169244320.pdf In PDF document text
    • http://campfirewtx.org/userfiles/file/nikozetogeretakimizo.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/54140160771.pdfIn PDF document text
    • http://mega.kz/media/upload/files/vimufareduvivifapu.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/vivafod.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b6645b8db---depuvobos.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16104cc8687279---jesobakejiginuwufukoli.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/7dff11675aee5f7a7f4e3906da483d86/27412280555.pdfIn PDF document text
    • https://cmetrix.net/ckfinder/userfiles/files/21569993209.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/suvafukisinuwib.pdfIn PDF document text
    • https://np21bellapalermoshopping.it/file/99561036320.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082adcea0ba2---dufivisalu.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918c4ed8ee5---motojagede.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/judavaxozawu.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/mijajizujajetumalo.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e59c9b5e215---37325931749.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/53510969831.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/tlesuif4aj2gli3ks5qan8gm9p/godev.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/93477400929.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/10993649951.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc90782e48---wuxarogiwaxunejebanatumab.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/banolorifukozajimapawabe.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a09e01aa3d---30941725411.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/5179768686.pdfIn PDF document text
    • https://machinex-machines.com/UserFiles/File/71390641283.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/40321011586.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=example+of+recommendation+letter+for+elementary+studentPDF 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_off000110d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000128ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EA 16572 bytes
SHA-256: 72769df4e265e295667ce143b00b4c3e150fba172c0245b8e9d6d02cf3c41ca5
font_02_sfnt_off00015353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15353 11080 bytes
SHA-256: 30e8ab1498320ab169a2b22f6879492abb81522ffa527a11c22771c9f5668c36

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