Malicious PDF — malware analysis report

Static analysis result for SHA-256 6058bab3c35df2ea…

MALICIOUS

PDF

86.8 KB Created: 2021-07-30 01:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 57cdd568ca440778e5c2500a1989f9f4 SHA-1: 0824cf3c2022a41fcbb2df7c1d2f1d133e6e1461 SHA-256: 6058bab3c35df2ea219c77b40b2e84a8fb650bd08d2bb7daa245fb1c7a7b2fe2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution lure. The PDF structure itself does not contain executable scripts, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://synerhu.ru/uplcv?utm_term=aaru+paranju+myavu+mp3+free+download PDF link annotation
    • http://chiengthai.com/file_media/file_image/file/lepapotedofononolemisokex.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/3hl9t0fnkhturdfat78g0vm03h/2096361700.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/k6fsnvad4vrtufi09pcsu4sa3s/98709185626.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790e8e4b761---gulorakawasinezapenip.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/ad9795c4f59c445ae910bf8f66022de5/28654778516.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/dktt7lkfucou0l5o3o4t4nj0i6/dewufegazavafima.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/47867463702.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd60d169a2---30115706596.pdfIn PDF document text
    • http://2020kellyfamilyreunion.com/clients/1/1c/1c0e63424c3b5e20a3d858f77c59864f/File/92232177500.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/009979d262f83c9cf49c19e76791eedf/54223069818.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/6e75da0a8911e4cde64c485f37eeb343/baziwalakixovekekivowed.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160939a3ee46e9---jesenitixazomitanupamisi.pdfIn PDF document text
    • https://aromamarketing.md/img/files/99347917420.pdfIn PDF document text
    • http://hanleyresources.com/images/3003428917.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072312db438f---40288018666.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/99441310873.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/vf8fe763hpd1ej7umns3bqmgi5/jevutatob.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/iopdrha8d9jdefct7c4te7rid6/95823610867.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/mfg06shclc16a6eji3c0rq5sdo/mutowewimaniridi.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/56687665609.pdfIn PDF document text
    • http://njf724.com/basefile/janatalnajafcom/files/kuxuni.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/birukobajawurevogokixiw.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/vibitosel.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/vibitepe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BF 10948 bytes
SHA-256: 4cd9c3f0eca68ddae3b8c1d1db2acf3513c8f134ce877741ca36a222f2655581
font_01_sfnt_off0000f131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF131 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_02_sfnt_off00010676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10676 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E88 17232 bytes
SHA-256: 2b6d459a8b2ef9d8b1d717fd300fe2d0494efcd26efe61ab5159b781f7e415d3

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