Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2609b06c63ce9d1…

MALICIOUS

PDF

84.6 KB Created: 2021-08-27 16:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a043461361db1c0c2db44fa40655fed1 SHA-1: e85775e7432f219abb43bb6adc6042daffaf86bf SHA-256: d2609b06c63ce9d1c4b9fa5758d34503cf8ab24626e8ed76108e73df7e2429fc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

This PDF document was flagged by ML classifiers and ClamAV as malicious. The 'SE_MFA_LURE' heuristic indicates it's designed to harvest credentials or session tokens by requesting one-time codes or MFA approval. The document also contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting it acts as a link farm to distribute further malicious content or phishing pages. No scripts were extracted, but the presence of embedded URLs and the MFA lure strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://sinice-rasy.cz/files/file/riruba.pdf In PDF document text
    • http://citescolairedeledit.com/include/file/84450104384.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/33940598963.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/keranabelawibuzatona.pdfIn PDF document text
    • http://veejaytechnologies.com/userfiles/file/17626046175.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/pugefobugunorenita.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/m7uj5bccl56qcff3il2sbsljn4/55709074645.pdfIn PDF document text
    • http://zuche0551.com/upload/file/67585447122.pdfIn PDF document text
    • http://nanobubblevietnam.com/uploads/userfiles/file/12610790100.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1607e12c317a67---86616936148.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/78258611559.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/pepigibaxa.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/sojawuzib.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18285130790.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/19713586351.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d64eb7bfd5c---74879150885.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f1a278623---pegoferilugo.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b907bfd0cee---83856237793.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/b0368f2b1512043a9b977b5784091d59/pimokuxanituzuvamebuwo.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3f81c079c---83504573527.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c6d2c991e---giranuxajogemanada.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/24218428797.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/28954891314.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/fd9913ebc3142082029c683b9df3a443/sajosojuxabogidinarafazek.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607561d9aeead---zinatej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=sms+verification+code+autofill+androidPDF 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_off0000e3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE6 17860 bytes
SHA-256: 3adea14b016037268d6e9a9c76f63dd38de6d0959979fffd863c2506e958a793
font_02_sfnt_off00012a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A14 10880 bytes
SHA-256: 4d9de369270eb4d4a8da7c7d9a7ba41866d72f88d440bedd6528797279cf7b59

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