Malicious PDF — malware analysis report

Static analysis result for SHA-256 2949061946c375bf…

MALICIOUS

PDF

86.3 KB Created: 2021-07-14 09:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a492185f455ea213d30fbf971a0ba0f9 SHA-1: 4955f191235722db684d4480648988def3b32437 SHA-256: 2949061946c375bf06e9d86227a0004bf193884d818493af2564cfe668bca6ff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many pointing to compromised CMS upload directories and disposable hosting. The ML classifier strongly indicated maliciousness. While no scripts were directly extracted, the structure and URL patterns suggest this PDF is designed to lure users to malicious or compromised sites, potentially for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • 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://garglob.ru/uplcv?utm_term=combined+gas+law+example+problems PDF link annotation
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/d671f949f5b6a7a8c61f4671865543e0/bivoxeg.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b876707c21c---2407538818.pdfIn PDF document text
    • http://www.nbc.com.vn/ckfinder/userfiles/files/55438996976.pdfIn PDF document text
    • https://kis-u.com/page_data/file/20210612151026.pdfIn PDF document text
    • https://coil.hk/upload/files/23250332312.pdfIn PDF document text
    • http://tms-operation.com/upload/files/webiletisomisop.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd3b1ef830---wadudupitutegemajirulete.pdfIn PDF document text
    • https://birotex.rs/images/files/5203751950.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/35acdf434aa5c2cafaacdce785d2a2ac/3188144900.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffded0b84e---20128003481.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a297a1ac78a---nefifepijudofazi.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/zisuwapaxejemuwogol.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160e3556df30f5---wufapamozesevugaterajosig.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/10383820922.pdfIn PDF document text
    • https://parfumzone.ro/files/file/93193888767.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents//files/90644410768.pdfIn PDF document text
    • http://guitarenko.fr/img/files/jipisami.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/71398472479.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/jugexevasazobotuvejatezug.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/15912712210.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/rabaxusasigapesejotu.pdfIn PDF document text
    • http://cfacgroup.com/uploads/FCK_files/file/depajibu.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/e0089b539b869c1bbadb023f6c44510a/bedif.pdfIn PDF document text
    • https://familienarbeit3plus.ch/userfiles/files/lejuzu.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/dejavan.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_off0000ecee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEE 17428 bytes
SHA-256: 18b2ef13c31554aca140166d85c540811e950631a5291b01e3378f28ec5fb273
font_01_sfnt_off00011a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A76 10996 bytes
SHA-256: b28aabd6af60e9b98622e221ac568b1a219763d8dd2276abe469c1df37a6107b
font_02_sfnt_off0001339d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1339D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1