Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed054f0927ff4df…

MALICIOUS

PDF

100.6 KB Created: 2021-09-01 01:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4cb3b7fa23587c0bbd119b1b1bc09890 SHA-1: 9594ac207dedd04b6c241553337f11634391dacd SHA-256: eed054f0927ff4df89af0f61b7e816f980bbb9ba96976da77c22f36d5784e7f9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to potentially compromised websites, indicating a link farm designed to redirect users. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's content is a pretext to trick users into believing there are new payment instructions, a common tactic in business email compromise attacks. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to facilitate phishing or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://peneleos.pl/userfiles/file/lomapepikigetugusuvepe.pdf In PDF document text
    • http://fundacionecla.org/resources/original/file/25383144476.pdfIn PDF document text
    • https://femagnet.com/upload/edu/article/file/vonapowadakeguloziravo.pdfIn PDF document text
    • https://maisonforville.be/documents/file/90825516211.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/20441196870.pdfIn PDF document text
    • https://buka.ru/sadm_files/vukurisamusevasujogaxo.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/tevaxitepawebudun.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe949995b8.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/dowiviwepagadezewigamopej.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/lewefuvekuzepoxanededuk.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/gomukaxuvesipatuwowizepen.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/26992820710.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/kejemafajufitepenozujali.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/qdqgqqqfpngdje1visfoanbelj/doladubomejizixuxirasiniz.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7b2b98c9c---poxepobuwug.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/22776967327.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d89e5388e1---83302420766.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/gejigewa.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/a425119ebf36cab4ff220036eb951c11/nitaxobetixe.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098335d1ee7e---jefosimalutaba.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0832976fa---tuger.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7535941d03---kexaluluver.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/fiwolojapebabufob.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/fenezepini.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/4c2499536a5aca0b1e4e316b06b9696f/roxisoligisulezax.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/22da57002ac2a27b3efbd3521acb2379/61545531144.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=accounting+partnership+and+corporation+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_off00011ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF5 19460 bytes
SHA-256: 4bc6ffb2b882255189cdc903042950a744e9f1957e70d1962a1047c10495f3cc
font_01_sfnt_off0001530f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1530F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B26 10936 bytes
SHA-256: 8a31672ef4db46c49cb35cb634eb37de2a5b597803838b7b776dfacd02ffbca5

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