Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c205c5a949a20a5…

MALICIOUS

PDF

91.1 KB Created: 2021-06-27 03:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6df75dacc1cf792359abffdda8ce2bc0 SHA-1: 73b057df6daa50b4701222fe0aad3458b187798b SHA-256: 4c205c5a949a20a5d03a6157cb37408c21d23cc1bb3486f4b69f4c23295ee675
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of these links suggests an attempt to lure users into downloading further malware or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d66e716aded---26222423699.pdf In PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/be355b9e7094cd8ec562b1492f6698f5/bitibuwitog.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/zixizipujalutiwedonigato.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/5nt1i803ce76g2ooegn232eupb/88081072359.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/cc67059ae4b7547e08c29ebb66b7f682/domapiduloxuxeterewimeviw.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/00fu3b9fr9b3jk3pv2dfpqaje3/21601056113.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160bab05a6ce25---kigorazolodajiguparita.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cefb8d71711---wozobevevevarurofulaza.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/9bd12ff8f71295e7cf518aa75e48220a/66342841817.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/tifim.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/cc6da9e7b91a3ad7fe1c2d6b7082475e/93666679519.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/f5fb8983e21a55f370a152b82123e021/90367464344.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9890a9680---32926036972.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c62355c22d---gijal.pdfIn PDF document text
    • http://dalaichau.com/files/xusomukojupafotojiselo.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b28107071cb---todar.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/nmm59e7ss3t6rc7oo3f0o3dcs7/31924658253.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/57757401191.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/vokaratuxiwomowujojuwelep.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/321f3f3c41af6b2533de3bf5b90dba4c/fajuwuzavakulerejedazure.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0c4083034---bopukupipupexolisikavupo.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/romuvoxeluvaleporipimax.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a050e47ad97e7dd610b5dc23c0a6d00b/91556123740.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021061522450573499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=java+certification+questions+with+answers+pdfPDF link annotation
    • 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_off0000fec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC4 17696 bytes
SHA-256: 901256bb08851510f5d0a762dfccd76d33cabde778906cd8ca02971b3de89627
font_01_sfnt_off00012d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001454a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1454A 11060 bytes
SHA-256: c9ed301d0b799aab9be886e2dc4ccaadf3861a0609c42ea9ad7cf67f05e6cc30