Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d5c303809cf79c…

MALICIOUS

PDF

82.9 KB Created: 2021-06-25 15:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0b714332596ba7ff49b6ff48713ca71 SHA-1: 060019505840ca3b1bb4c92a4f8ea55af2d45d5c SHA-256: 22d5c303809cf79cfda0a2c0ffb88fd0a5f0c14d8d35a8f7e9d77a037bbabd1e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links pointing to compromised WordPress upload storage and other disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ahchala.com/img/file/fewuradetorejenafuruwegar.pdf
    • https://alnahamgroup.com/userfiles/file/sigerar.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/vpdrkf6ata486gi70qturaoicp/likinedoluw.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dded460a2---9044483043.pdf
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/32393685995.pdf
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/80637057578.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a113ef5f9de---nesebubimematusugebisoz.pdf
    • http://technoculture.cz/admin/upload/file/11361655653.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/06ac27f6d1461762626100bbcc115e97/4048677175.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160888a369cd19---sodupulunufunadasipiwu.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608624760df62---43457222000.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4617de207---biruwopi.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/af9539943481b48044baae70e0d666da/lotoditelogiluditoxu.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608da1167f0b2---kedakigabomuxizoba.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6316bdbaa---savitomegelufetagujovon.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=brown+rice+upset+stomach
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ced455211---birojivukolog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e211.bin
f6172f24b24ea1707509fb29609806048872fbb50160cda9067db4781ead541d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE211 16904 bytes
font_01_sfnt_off00010e00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E00 16792 bytes
font_02_sfnt_off00012617.bin
fc7d9a5a07aa6a47d04aa6e61aeeb763f1c0494f6460bd43898fedb060354ed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12617 10832 bytes

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