Malicious PDF — malware analysis report

Static analysis result for SHA-256 222eabcd83a816fb…

MALICIOUS

PDF

79.7 KB Created: 2021-09-18 19:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b0270f3a4361ab2bdacaae9b656f4042 SHA-1: 6ebd1ca9815d66961ee946a11387c57d4e34de97 SHA-256: 222eabcd83a816fb24724733b211c05dbfbffee109b7e9805cfba8cbc09460f7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/uplcv?utm_term=what+you+need+to+make+potions+in+minecraft PDF link annotation
    • https://jagamimpi.org/contents/files/68285249031.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16143aee669841---42251197154.pdfIn PDF document text
    • http://lerucherdesanges.fr/userfiles/file/8114660106.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/vizogivowenizir.pdfIn PDF document text
    • http://nprofit.hk/userfiles/tuwusapapanidemi.pdfIn PDF document text
    • https://southwestlooms.com/admin/userfiles/files/nejuleviz.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/jefipuxiwunofogosu.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/52573877644.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/pidudubev.pdfIn PDF document text
    • https://fond.ru/userfiles/file/rujelejujoxux.pdfIn PDF document text
    • https://znalac.com/userfiles/file/zolitojubi.pdfIn PDF document text
    • http://asia-test.informacittadino.net/media/files/3684071459.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/374c2a13be844eb7308e01700a198dc0/jujorujibuxeviruna.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/suwuletem.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210917_2462E7BDE9B57446.pdfIn PDF document text
    • http://euro-ex.net/images/blog/file/pulumupirejudetuse.pdfIn PDF document text
    • https://drhuanghair.com/uploads/files/202109072152418846.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/lirir.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/bixaxilidufutoru.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/93825740818.pdfIn PDF document text
    • http://baschin-heizung.de/meineBilderAlbertGrundschule/file/fapotibukawugenexilaseja.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/44253723878.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/dorup.pdfIn PDF document text
    • 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_off0000d2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A3 17392 bytes
SHA-256: 3db1eedb21d96d1f13dc7bf0f20397fc2a102c3294ae8a618e7cdf35998bf4f5
font_01_sfnt_off0000ff4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4C 11140 bytes
SHA-256: 5058ea49d57ba15052ea4f43e658d7ad251e659745b9e66d6107ff03fddc1002
font_02_sfnt_off0001192f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1