Malicious PDF — malware analysis report

Static analysis result for SHA-256 610c0f8bc1b6ef4e…

MALICIOUS

PDF

87.2 KB Created: 2021-09-16 21:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6178bdffc469dedd5d5f507cd749ceca SHA-1: 5c4c6a22396fc7943dd6d2ef0bf363bdebc3c7ef SHA-256: 610c0f8bc1b6ef4e133a5d5d9d034e3fe8b8bd78a76e76ab088dfdf1befb0754
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://pixomot.ru/uplcv?utm_term=magical+games+for+android PDF link annotation
    • http://cga82.com/admin/File/78250100357.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/paruzupufis.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/t98no2og6lg9tm7p86thbvq5hs/12000885385.pdfIn PDF document text
    • http://xn----8sbfhu6ab4bqv.xn--p1ai/userfiles/file/tazulopigaxodujakipuj.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/lixilaf.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/nerefisejawisibi.pdfIn PDF document text
    • http://union-montage.pl/userfiles/file/29359966866.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131e2da46a5d---23941249822.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161370bc353332---28309765187.pdfIn PDF document text
    • http://deleersnijder-bocaege.be/images/file/76686972246.pdfIn PDF document text
    • http://bakoca.hu/files/file/tizuvimexupajefewulug.pdfIn PDF document text
    • http://eluvial.com/sites/all/sites/eluvial.com/files/58553974512.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/0ba6d3ac22c62cfb706949fad3e6f259/gepugiwesoxapoditax.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/demurirujodajebuvaf.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/mupuxewexap.pdfIn PDF document text
    • https://fix2go.info/userfiles/file/keniganulugutiw.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/22730417388.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/bgdgiti7gvjvcjd6b21uv7cngg/wepazixuxejaforatovix.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/12100262969.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zumefasivalawubugaj.pdfIn PDF document text
    • https://educhina.mn/editor/files/62710410199.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/u5q1jhrdk8nnslmuu8860cb4fk/36620221980.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/80566004666.pdfIn PDF document text
    • https://comfort8889.com/upload/files/18232073722.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/fepif.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/kulufasogafevapusutadipix.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_off0000f219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF219 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A30 10716 bytes
SHA-256: f1006eecaf926987b0257561bcd03dc56bcae311d1f4a024869156d45fc466ec
font_02_sfnt_off0001228a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228A 17172 bytes
SHA-256: 528067b9e8e89b8abab1b1583bd84637d1e0d6489a27fdb981b048ebe78f17d7