Malicious PDF — malware analysis report

Static analysis result for SHA-256 584af1e14b7ffd7f…

MALICIOUS

PDF

84.8 KB Created: 2021-09-21 22:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 040d7bb88b696dad9f7f59a42baa00c1 SHA-1: 89c84d867229d6638fe5a52fb0be5489698b5f3e SHA-256: 584af1e14b7ffd7f89296645b388fd58710ab9b138f6acbe5ce2a84afac05ecf
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed for phishing or malware distribution. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly indicates a business-email-compromise pattern aiming to trick users into making fraudulent payments or changing bank details. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://irlanc.ru/uplcv?utm_term=how+can+you+transfer+apps+from+one+phone+to+another PDF link annotation
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/14453970473.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/wutibinewilukonowela.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/rusigifagaf.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210908_028316BC16D20614.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/kotivawup.pdfIn PDF document text
    • https://electrodomesticaruano.com/images/ckfinder/files/66379212419.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/i0i9clu72tjsm0er07vrjah416/26849006639.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/ziwurogotosigiduxoluwaxen.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405dac3d873---61282807226.pdfIn PDF document text
    • http://chiuman-hk.com/images/file/73551166555.pdfIn PDF document text
    • https://vinaconexmec.vn/uploads/news_file/64386673719.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1614858baa0520---dapigamim.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d7e27ba49---4539773510.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9fed60f0d---wewusolajawexagobovurun.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/12359747737.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161464469d2c83---pafujofesuwubozegusifoxo.pdfIn PDF document text
    • http://brukbet.com/user_images/file/winodotu.pdfIn PDF document text
    • https://www.kindspring.org/inc/ckfinder/userfiles/files/vejuwolusakopitememug.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d091d3586a---rimaridovulofilanuwiwis.pdfIn PDF document text
    • http://jungam21.com/upfiles/file/1631030387.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/70413239958.pdfIn PDF document text
    • http://travelbilet.ru/sites/default/files/file/98072590009.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/xajurojakukidimij.pdfIn PDF document text
    • http://www.bash.cl/media/file/tevar.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/72320986010.pdfIn PDF document text
    • http://ficfart.org/userfiles/file/dibumimememuka.pdfIn PDF document text
    • 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_off0000e484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE484 18100 bytes
SHA-256: a553108f262ec7df57b4784e949214b43cc03d30b30dd5fdca21110c258f63af
font_01_sfnt_off00011388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11388 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9F 10900 bytes
SHA-256: c8772f18c2642bc827bf46fdcd107abe8c0ec0568a1b93f70a784e0f69c33e0d

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