Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb2f5f9e2e09116…

MALICIOUS

PDF

82.0 KB Created: 2021-06-25 23:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a328af3c8969a1c9442f283323301314 SHA-1: c0ae490e549ff714f2ff908847f94d1a1f46867d SHA-256: feb2f5f9e2e09116186c6a781e11b97f4f808a644cdfa5f2f7d51d3c40430548
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and link farms points towards a tactic of directing users to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1fda312dde8613ad7901ce554bd73f74/fumiratojotoduzifojen.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/31efe25b9217464336c91c584bec1baf/78409017587.pdf
    • http://uralinteh.com/uploads/files/xisogemokiwig.pdf
    • https://dm288.rs/slicice/file/mediwosilibutog.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/a9e04220eecea00064dc3faa01be4b4d/katitewovibixikoz.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/350dc739549b34b4ee035945c3d4787c/nidipoma.pdf
    • https://binarbaid.com/public_html/userfiles/file/maditaxakiremolekaga.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160989f7aefc60---10965974017.pdf
    • http://rbtyutj01.com/userfiles/files/makufawemitixezoluxot.pdf
    • https://an-professional.ru/img/files/file/51360954004.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/2190197eff210fc3c79502772891cfbc/bilidugerudotalexijulav.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/e5086c62fe6725d215747f1b9cba8959/3020224450.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775e7c5e649---torizamenewetuzo.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d9f5f27d3---40917084705.pdf
    • https://iwnta.com/userfiles/file/gowafezoluxuxixekaxe.pdf
    • http://allmedicus.com/userfiles/file/sutulur.pdf
    • http://saokienviet.com/uploads/image/files/judojarov.pdf
    • https://negaratoto.com/contents//files/747773841.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e3ef9b0f5---57189610473.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/e6bv9g6ttdt6r9ulbj6i20ffl4/93180375594.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d45ab85e4d---kofidikivuj.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/75a9d14991b80afcb9c07d24468302ad/tagimubufukeliruk.pdf
    • http://forter.vn/hinhanh/file/63288156906.pdf
    • http://kokocurry.gm/userfiles/file/japabetavug.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=nagabe+girl+from+the+other+side
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db37.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB37 16792 bytes
font_01_sfnt_off0000f349.bin
ded6d508bca7a71ee78fbb4b03120d983fe2895dd24d60d6ea12f4bdf30f1390
pdf-font-stream PDF embedded font (sfnt) at offset 0xF349 17440 bytes
font_02_sfnt_off00012073.bin
d536e4ec420b7ad39734d564d7082a620580b278a8746bc44b4f1060e54b8113
pdf-font-stream PDF embedded font (sfnt) at offset 0x12073 10812 bytes