Malicious PDF — malware analysis report

Static analysis result for SHA-256 265919f66c60166c…

MALICIOUS

PDF

97.7 KB Created: 2021-07-02 05:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d84278057b5f8f92e60c6c122a70f69 SHA-1: cae9c494846b62d00eb2de55e6da61d23eec6bbd SHA-256: 265919f66c60166ccbdcbc65bf6f7f71c35eef5681bf284b73fd9497f4aa39f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://infrive.ru/uplcv?utm_term=the+meaning+of+velocity
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/hfi5lledrfr9ivtemdse80omjc/panonuzimi.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba64a420154---74686040737.pdf
    • http://paroissedementon.fr/upload/files/14203891417.pdf
    • https://drvishweshwari.in/userfiles/file/18332197163.pdf
    • http://universalestetic.com/userfiles/file/8193090858.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b43548a352a---10442875281.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/9226e4f1f2917a563ea39725c0a93ef2/devisipiviga.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/omol35e18t3o1olk1grckgaekb/bogexufat.pdf
    • http://agataklimowska.pl/userfiles/file/kududelenaraxupoka.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16077724680012---29545815065.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62456011c4---72009482836.pdf
    • http://ned.ru/uploads/files/vemumiwozuxe.pdf
    • https://mimpishio1.com/contents//files/61207410988.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/26e93342999e9751d939313970d8bc9d/79359466644.pdf
    • http://akinmedikal.com/uploads/file/3794920694.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/a433c7c20ff80d240b41af69d24bcc35/bafani.pdf
    • https://alianzatours.com/imagenes/file/41211894024.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5877a7069---kexozofemokububatobovaj.pdf
    • http://www.annaleehuber.com/content_files/file/74162246564.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/c11718251cba0d74483716b226e26e27/99231132976.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe09.bin
96c5362b4120b4a1d3471223b05bd797e05d447d61a2f01feab18fde4931d6c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE09 10656 bytes
font_01_sfnt_off00011648.bin
8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
pdf-font-stream PDF embedded font (sfnt) at offset 0x11648 16060 bytes
font_02_sfnt_off00012b5b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5B 16792 bytes
font_03_sfnt_off0001436d.bin
907667f074291fa845a69742312e6dc308a02de7c1bb316ad9f24239fa345fe7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1436D 20180 bytes