Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb8cd971828f7d9…

MALICIOUS

PDF

79.2 KB Created: 2021-09-04 21:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0d1784a9109e9022bc22f23e94d6acb9 SHA-1: f492875e020f487e93896606dada55f9d72a7e67 SHA-256: beb8cd971828f7d98f4cc7020b0612ae7c5c9b5fe0c54f0ccf460fdb799ea442
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS upload storage, with multiple URLs hosted on potentially disposable domains. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to malicious or phishing content, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • 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://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611fad2720828---texujegizol.pdf In PDF document text
    • http://innotec-industrie.be/userfiles/file/bamowozezeduwebu.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/xarutanini.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf4d6d33acb---ritaxodadazuzosokumiloref.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160adf775428e3---73295403801.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e135c9a346---bodunitalepa.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/866i2boed127kati5kgolhvmvp/85619828060.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907113052bc---82202079893.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210819_8637E2A5550AA79F.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/e179a85fbd19137061272bf6b774a036/8789146505.pdfIn PDF document text
    • http://peoplefoster.com/pliki/tozupiluwupu.pdfIn PDF document text
    • http://e-district.org/userfiles/file/44396876597.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/waxogunufo.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/7133290880.pdfIn PDF document text
    • https://27061010.com/uploads/files/202108161750385304.pdfIn PDF document text
    • https://chp-travel.ir/data/file/roxezun.pdfIn PDF document text
    • http://absigorta.com/E/file/sogosadawaxagijel.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/zejinugizutojif.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5a9383383---radiridumunikif.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/3cbf915452684c3ac430c45d14effb45/soder.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/fezopexesunetadoxurarog.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f99b7688e---mifagarifubokepodefarax.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/41875608.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b47bc821f79---43318297041.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2603f6498e---ferinugixejevenon.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/91251256792.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=manual+camera+nycPDF 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_off0000d5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F2 16980 bytes
SHA-256: af8740e8f2a8ee4dda4beebea8656c054a8da153c9994f0d4d09751c7f85e677
font_01_sfnt_off00010201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10201 10120 bytes
SHA-256: 945e04ec616128ef9e2b3227aa3e3ee861332f292265f6c1cdf1d99e8a44e233
font_02_sfnt_off00011891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11891 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.