Malicious PDF — malware analysis report

Static analysis result for SHA-256 66bfcdce57e3c31c…

MALICIOUS

PDF

81.7 KB Created: 2021-09-16 16:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 97a2f1b7f33570475309b191ae091f9c SHA-1: d1287f73f30bceff4fb5361b20bedbec3d82d78e SHA-256: 66bfcdce57e3c31cc6755cfbe8af9ec8e0a15983eba3bb5b4344a2f89defcd63
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm configuration. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The presence of external URIs and the link farm structure suggest this PDF is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3358

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://smidgel.ru/uplcv?utm_term=custom+app+icons+for+android PDF link annotation
    • http://amsasecretariat.fr/userfiles/file/xoxesawuseronalunagotavos.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/mewisebowisomove.pdfIn PDF document text
    • https://geelaboba.dswip.com/ci/userfiles/files/verasipatopofanazeketa.pdfIn PDF document text
    • http://askaudit.ru/price/kopedireruj.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/jemuxowemoj.pdfIn PDF document text
    • https://equinox-e.com/upload/files/pemawejuzobuxoxewifi.pdfIn PDF document text
    • http://antasboru.com/guvennet/resimlerfiles/wudevufas.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/watijukikudininog.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/bidapamexesaxi.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/worowasa.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/dobexudiwokawa.pdfIn PDF document text
    • http://naszemotyle.natura2000.pl/imgturysta/files/votivirufola.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/jolufiwazavaxerepagogup.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/xubezibazidataluj.pdfIn PDF document text
    • http://guowangcable.com/d/files/62349659256.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/gejix.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/dejadixazemapaxi.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/11449075699.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161403ef928a94---42663872153.pdfIn PDF document text
    • https://n-tlg.com/files/file/89976866885.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/77170cecf02a8351dd265a7eb1394b2b/fumunomipebegalovidebo.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/11304383252.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/sutojokug.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/43306068781.pdfIn PDF document text
    • 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_off0000f5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F0 10736 bytes
SHA-256: 7d1aab59033b4f9bfe81cf93d5eb632702dc40daa961772ba5b20a91ab6f0593
font_01_sfnt_off00010ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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