Malicious PDF — malware analysis report

Static analysis result for SHA-256 c828be1922050c89…

MALICIOUS

PDF

76.2 KB Created: 2021-05-17 17:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbd2c151f90b5680a23eb2761af5bd3e SHA-1: 3e287fe1a40131683fa04412b4a9d32ab3b5758c SHA-256: c828be1922050c8942851179e31ef8161a3b095ae0ff66f70fc628d6c3779c7c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious by ML models and ClamAV, indicating it is a phishing or trojan delivery mechanism. It contains numerous links, many hosted on compromised WordPress sites, designed to trick users into downloading further malicious content. The document body, though heavily obfuscated, suggests a lure related to a 'Banamex privacy notice'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9480

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://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/17a51e0aa00b3e68969fd18fb373844d/kosafini.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/88b06b1669481c5bbb508d092478d418/1123148631.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/2b56b05364d2a5174eb168d4f7e3a96d/75031126604.pdf
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/40930407120.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6ca7e018e---75081595739.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082e4cb77a20---niduzosaborevu.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/j999p49jphaop7qbh09oakfnr6/88057163585.pdf
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080f110a0791---xefefupeveniralarekowem.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160926a8f321e3---33988071416.pdf
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070fb3a4fb9d---42112550017.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/0492ca4e08c524271e966badc83869aa/72124073466.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607104ab39698---xukagokurasemavuki.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16096ebd5d16ea---gewufipepotewuxi.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609212ca27dfe---3780090154.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/daa00baab1182311a22fd094662a19be/45855475946.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=aviso+de+privacidad+banamex+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f0.bin
4378e87bc7a434dea8695a2a8a3c24a44894090f78d58dcd29fc432b99e43b13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F0 5236 bytes
font_01_sfnt_off0000fb98.bin
013e6d3af5ebbd72ca7ef5cc3565e701ed4864095d16a1acfb53eddb37e1f6b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB98 11912 bytes
font_02_sfnt_off00012267.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12267 4324 bytes

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