Malicious PDF — malware analysis report

Static analysis result for SHA-256 64628f12e4d02ca9…

MALICIOUS

PDF

149.8 KB Created: 2021-06-30 21:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 2d8a3e5a6789e2b4431441585afbf4db SHA-1: ac0f33ea8d63c116ceafb8c1842d32c6e2bf93ff SHA-256: 64628f12e4d02ca929131fd4f97181c24548fae4cd3709492ff3984bec535a55
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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://philabc.ru/uplcv?utm_term=relationship+property+agreement PDF link annotation
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/f490ba0903fb6a56c013eca445d19b78/gizezepumapemod.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/210414509603.pdfIn PDF document text
    • http://vinmexindia.com/uploads/mokoxugatebejebaloz.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/2ceb948c5bd7e80df93c53f187bc226a/41903278913.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d822fa8bcb2---33745126783.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/af46ff50253f143f1df3ba28ba699441/zewudilej.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088332a94921---fojoresurabinunom.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/snmukq5p3pa7v0lptd2ak6ngtg/fujuvebemiwipedadafodurit.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/0d6c90fcbdd312d06174c79371c920e1/51361939638.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b284c0734---80174040634.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/84509534228.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73da67e6b0---rumupewokipudovolu.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607eedef69398---tenamojijovoribovapele.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f24fa0d0a8---jedubonibosowilume.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/44347389556.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/6b69ch74d267tlfje5uue99nl0/fowufixawotagoso.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/kejojexanavewibarog.pdfIn PDF document text
    • http://accronline.com/userfiles/file/37032518492.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c6c014038---butorivawixided.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/u031giben5gaamqclc9p05t1q6/24907000707.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/7fe6edf7f20aceb60911b4291bb28bb2/pinukimokelewetigutekoko.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/luxokejolowol.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608f820047f5a---debegiveduzobari.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_off0001e8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E8F9 10856 bytes
SHA-256: 56c29e7168edf0ba3ceb99dc01c230bde9443d450b88e6bec44592aebd0a1fe3
font_01_sfnt_off000201df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x201DF 18148 bytes
SHA-256: 12b749099193e7d31c4c69b3eadca7417d30e43627c4f35d9efb2dd5cf6e8720
font_02_sfnt_off000231bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x231BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.