Malicious PDF — malware analysis report

Static analysis result for SHA-256 42adabda1c80eb67…

MALICIOUS

PDF

83.7 KB Created: 2021-06-25 22:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f92a2106a9aeb0ab1b4d2eb0158fa85 SHA-1: 117967ab31c2af94ff0c6ea96ae9a9646f43cec1 SHA-256: 42adabda1c80eb67823a432cacd515981e872a8d78a1915d9fea0b202a716163
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085b8e4297c6---rupanorugarumipebow.pdf
    • https://ljlconst.com/admin/images/file/97365346396.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606cffea5055b---9771616956.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/0ab71086abab3bbdceb4b5e4e12dda3c/99696679296.pdf
    • https://loyallcanada.ca/editor_files/file/boruforozixetevuf.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c6414848674---81857927324.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6bcdb0c26---86926335638.pdf
    • https://theatresaucinema.fr/uploads/file/fumegimizawujakokubow.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16087ea7cdd4aa---2850568424.pdf
    • https://sasalidayanisma.org/uploads/file/55556240870.pdf
    • http://albino-pitti.com/pub_img/file/49079161285.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/b49a16071260195d803c4d5d61b29921/81513869956.pdf
    • http://duda-tech.pl/dudatech/upload/file/86792470917.pdf
    • http://haumeaonline.com/userfiles/file/63463161857.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/908d8faaa0684f0512f8954e68d18ae1/42929597722.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847979bfdaf---sebimezetajumabixij.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/5f15615f8ef90a1a7e60fa593f851200/dasuxonagulow.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/078d81c4d00f57317dfd96287445e398/83938991988.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/22ac95d9bf947c5800ac1c32b03dae76/30116521532.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/2bfc741bfa0ba5cf4a9a50ab1ba21e56/75850440353.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d557626662---valazetikevav.pdf
    • http://farashimirooz.com/files/660658308.pdf
    • http://aarogyamedico.com/userfiles/file/sugakux.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=fraction+word+problems+grade+2
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e597.bin
2f6f9cf9ddb117b9d36699bb2a9d2a6014345a03d61680a2213f7a6a028a4d9b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE597 11180 bytes
font_01_sfnt_off0000ff64.bin
7d4359768bd970176496a47f3254da7d90d372ac840f2462be8be9ade65cd78e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF64 16408 bytes
font_02_sfnt_off000129cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129CB 16792 bytes