Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f597011e624b490…

MALICIOUS

PDF

70.2 KB Created: 2021-09-07 01:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0b18f0c8d769a0478c946095bf30a3d6 SHA-1: 8af4dfa61f1f29133d97299fd79e429a220d489c SHA-256: 4f597011e624b490814e88810612e9f989a25cfb9b837aac571ca3bdf889a68b
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to websites hosted on compromised WordPress installations and disposable domains. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3555

Heuristics 5

  • 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
  • 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://beiwendq.com/userfiles/file/34921873066.pdf In PDF document text
    • https://afayl.com/userfiles/file/4736560275.pdfIn PDF document text
    • https://alyansdugunsalonu.com/userfiles/files/sirepivuriza.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/nojipebixegufenifoka.pdfIn PDF document text
    • https://collegemahan.ir/basefile/collegemahanir/files/gaditewevotojasubu.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/f88b623dfa4ab5e33a7e131f90ac25b9/xisutukazisafidip.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/2bc9c011aab8dff9ed457dcbe3bfe403/47401100453.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a3f21f2ad1d358652318b92820aca3d0/83394927354.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/33649029452.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/49027351995.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/29872510925.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/82286537074.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/pivigemiwivizowojip.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/nibozijapojoxujiwadexinog.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/15733275772.pdfIn PDF document text
    • https://hobbyschuurtje-webwinkel.be/images/userfiles/file/pefidonegibiduworunabil.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/d9542d41a3d58d9cab188ce4abdf24f3/kukatajep.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/bof97cg16cf7du5s0626remmj6/togovesefevijepeveziz.pdfIn PDF document text
    • https://euchebnici.com/img/file/16026170134.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/e37f3c9ba2f88124c03223530a6386f4/69228530326.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/66628751140.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/logenasobegipefafebumitiw.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/29216222086.pdfIn PDF document text
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/gixanaguxalogiwupo.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc143a6a45e---finejulaxiwegixej.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/82410496752.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=guillaume+musso+pdf+francaisPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC39A 19004 bytes
SHA-256: 0ec1920458babdad7ba84e00acc0ce3fd684e138e07fc2c2c42c2e6cd829af09
font_01_sfnt_off0000f36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1