Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ebc08bed9bc52a6…

MALICIOUS

PDF

76.5 KB Created: 2021-09-22 10:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4c88dc47ffbe9e22dda1b88ead12e15c SHA-1: cb5390063105ce5db53dd81ab12e7fa902c4b23f SHA-256: 1ebc08bed9bc52a6039f8ed1aaba7f76d6f81911913ef9c0f8f7126e364b32eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm or phishing lure. The presence of external URI heuristics and link farm indicators strongly suggests the document's purpose is to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://garglob.ru/uplcv?utm_term=hack+a+phone+with+ip+address PDF link annotation
    • https://bselink.com/userfiles/file/9209677964.pdfIn PDF document text
    • http://torby.kbo.pl/ckfinder/userfiles/files/57836391383.pdfIn PDF document text
    • http://transporteslaplata.com/imagenes_web/file/ramavadaneg.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/mezitaririvevufakunili.pdfIn PDF document text
    • http://newbiesites.com/userfiles/file/76396368658.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/51784201192.pdfIn PDF document text
    • https://lordoptika.hu/files/files/filelosimijera.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-14/20210914064600634752.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/lagaxifoda.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/2ac51cee2467cf6d33429aa7034ed3f6/memejena.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210905_014955.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/11263848378.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141fb8dc0557---bonetu.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/59088182514.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/jaxemigipu.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/gopugabamusulopasenexajam.pdfIn PDF document text
    • https://alhasooncorp.com/Files/files/xaworuxotobuferapafivupuv.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/kizej.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/favomabamugum.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/4912689312.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379702a9ec6---18746382188.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/gibaweledomaxetuko.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/siravenogitelikofes.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_off0000c75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75A 10732 bytes
SHA-256: 38aaa379ad634f7fe9cb9e600f4b691bf810e589fa329226f7ce07b6b17462ec
font_01_sfnt_off0000e010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE010 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 16996 bytes
SHA-256: 0e0c5ecaa304e087250023a4488d0295de2ba27f6afea164661bea51ed8dc9f2