Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bf2c0131a4afed…

MALICIOUS

PDF

73.5 KB Created: 2021-08-13 12:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4343e5785d9f94f01c74b1ff014f0cc9 SHA-1: 556f9eca533c601d291023251fccb1a9acd5d2b8 SHA-256: 97bf2c0131a4afed9c091ec8ff0bc4a387f47b11b9c5656e069caaa362feae7b
174 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it likely serves as a phishing or malware distribution vector. It contains numerous embedded URIs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of external URIs and link farms strongly suggests an attack pattern involving spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8414

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 http://stigstudiotecnico.it/userfiles/files/vafefo.pdf In PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fd7a48118---jakamotugatulupipadediwo.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/61460010596.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/litogonifevise.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/41370489077.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91d395918---4998845027.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/vomiwetuvumexaxofagitu.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/4f91fe87c451a17044b231040b19f025/80156944190.pdfIn PDF document text
    • http://52.74.160.208/ckfinder/userfiles/files/7188170606.pdfPDF link annotation
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d1dc72bdf---43333598333.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/2a5783e5c8acc1d5f49a671aabd09089/nanurofuxufusoxez.pdfIn PDF document text
    • https://mgrenginiai.lt/ckfinder/userfiles/files/bataxije.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/ribizisinekake.pdfIn PDF document text
    • http://megalaserasia.com/upload///punanusuwukigelebi.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/85119610271.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/afbc1c168c71e84ab70ddb1b3a56d33a/goxanerupejuleromese.pdfIn PDF document text
    • http://hrudolf.com/userfiles/dajabo.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/33f0a15d405601a8ff6b4ef3c058b072/dulezawalikameku.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/resinixadok.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/vifazijabaf.pdfIn PDF document text
    • https://makanbanyak.net/contents//files/83444571413.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8da5f10acf---repigodowejisa.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/potalagibegokopi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+do+you+get+unlimited+coins+and+keys+on+subway+surfersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1