Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c876c30aaf79ba6…

MALICIOUS

PDF

84.6 KB Created: 2021-07-09 00:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f21a8bc73714572b2d3b00b185095b18 SHA-1: 27fdcbd6c6116887ede3c478018868a39bad86d6 SHA-256: 4c876c30aaf79ba619edf18fa77ca3eba1ca9f3978e19ad6530507a5dfc4417d
144 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to various websites, many of which appear to be part of a link farm or host potentially malicious content. The ClamAV detection and heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a phishing or malware distribution scheme. The file likely serves as an initial lure, directing users to further malicious sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.2479

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://pistant.ru/uplcv?utm_term=how+to+save+a+file+from+imovie PDF link annotation
    • http://whatdwellswithin.com/file/58546257428.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080136d138e5---58679905031.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c1565edfab2---gedeg.pdfPDF link annotation
    • http://orgue-chantepie.info/FCKeditor/upload/file/64399464008.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/mabuval.pdfIn PDF document text
    • http://change4best.ru/upload/file/narofosutifazufojozo.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/30493900418.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/l14m073bsf6dfpelpmogcbdl78/8730332010.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/femixogatodudij.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/timekikibovoxuzubir.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/hpd7riv466kpn3icgopsrlapnn/16211753951.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/60167724339.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/fa746a40a2f0a30ca60f4e7baa1c2b22/sireza.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/42844366898.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/8b04fa3d5dd705bb9b15e0d367448340/fonigepuzafutolagefijopal.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/ledaj.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/9771be4ceffd85962270dcd6c5a62700/65941082867.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/90188026810.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da7531aad04---41843694342.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076593226863---jajotu.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/rvueo1m0ivmlqhapr8ditmoi10/foponoxavekuzoneboleza.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/60353179587.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/rupigeromoj.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082eb2740d08---68619477103.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/22178956004.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/36259500373.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e20179ae160---davuxegasasikugotunexem.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10112 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11924 17248 bytes
SHA-256: c8d9c52e6c747d150c399391135e820817775f809371bffffe22887cdc6ff8b5