Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e68f27eadc0183f…

MALICIOUS

PDF

85.2 KB Created: 2021-07-07 10:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ece9488af9ef91e0db98de67f92cc051 SHA-1: 22bcd46b1e9c5c4644754502166fdd3ac1de633c SHA-256: 9e68f27eadc0183f8b67a96582bf5d9ac596a57af3656fe4d038257b3e4d8a5c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.2133

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://nomylo.ru/uplcv?utm_term=educational+links+for+students PDF link annotation
    • http://nature-revive.org/files/file/bupowutoketorilasolu.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/ludibokit.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5f73d2b867c4f31e220448963b649de2/nabexavomero.pdfIn PDF document text
    • http://puppiesulove.com/clients/7/7f/7fa6d7836ea929643a3c23f4562b158d/File/37761298519.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/9l9l0nbg2sllmlim7bu0tnvnom/sejuvulegekabozofipumexi.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/48097756930.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/28249125220.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f86d254fa---zewejine.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/26579552718.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/42b25cd59aca345b9197b29a4171eb55/gavoluvaruririmezarafur.pdfIn PDF document text
    • http://smiletoursvietnam.com/ckfinder/userfiles/files/zejagiker.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c903e7e00b---59951513319.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/najeralupiwegagem.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/25117271402.pdfIn PDF document text
    • http://domainecomps.com/documents/files/vunodatabigevifirisidixaf.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/111854531995.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0e95742b9---81837589745.pdfIn PDF document text
    • https://bonacorsi.it/file/gotusunekiturix.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/renokokitadulogines.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/lutagatimosewuvapo.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d87716e0d35ddced81d2fd091c733484/toruwikijip.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/604a69ee19dd83cfff9e965be82688c8/nekomovatiderefakozun.pdfIn PDF document text
    • http://bhsclassof70.com/clients/a/ac/acf0241a72c9eb28a719a759cf8a4748/File/pusewoxoluvezij.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/fufojopebepamosuxejaxaw.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/sesopabivebezapepal.pdfIn 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_off0000f4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D9 17124 bytes
SHA-256: 0ce71e0540e60d2338a6186f329f2914b3e31e4b429f9722098a270000818d37
font_01_sfnt_off0001214b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1214B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13962 10644 bytes
SHA-256: 114204de91bf5035073a88791c74613f61650e1dc78612c3287ef929ec933aff