Malicious PDF — malware analysis report

Static analysis result for SHA-256 30843b314e33dadf…

MALICIOUS

PDF

70.3 KB Created: 2021-09-16 13:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 49aed59956b947e9331ce77ec18e3c11 SHA-1: cc9177c64cce7412658874c986cbf27f1cc7bb15 SHA-256: 30843b314e33dadf48b3d2ff57b5804bc2176a0fca781f2945f83bbc344f0e2c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the presence of embedded URLs points to an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=doctor+who+lazarus PDF link annotation
    • https://t-groupvnxkld.com/uploads/news_file/bikoriwovutiwimukos.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/78787008386.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/161369c6d3c37e---81200433313.pdfIn PDF document text
    • http://dopuskvsro.ru/UserFiles/xagujuzarunad.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/rumebodavosemaxe.pdfIn PDF document text
    • http://debten.net/UserFiles/File/60659079109.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/roguvo.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/8152861687.pdfIn PDF document text
    • http://zlhk.ru/upload_picture/file/wogatobiz.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/vosegofotefof.pdfIn PDF document text
    • http://www.skk.com.hk/admin/ckfinder/userfiles/files/gojugelikod.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/fisikifakakogidin.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/39678857234.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/71820157715.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/jomudi.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/hdffv1lca7tilfpit3f39bvrip/86409726232.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/42633638855.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/widuxibezu.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/rezavugalixulanafox.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/zitalupilimetidore.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/39701392885.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/kapibigopi.pdfIn PDF document text
    • https://reclamesticker.nl/images/uploads/file/In PDF document text
    • https://sunnyrosesschool.com/userfiles/file/kepekanidisepug.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/gazexerebolara.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_off0000b3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C6 10248 bytes
SHA-256: e739eb71be5342730178063ec844795e4c54bf82726115aeed472d25a667a92f
font_01_sfnt_off0000cb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE323 15860 bytes
SHA-256: 3d281501347a787a3f51ac6ebfd783c45d121eac427dae7072dd0d1d5bfbccc3