Malicious PDF — malware analysis report

Static analysis result for SHA-256 986f8ec97a97c853…

MALICIOUS

PDF

70.6 KB Created: 2021-09-24 19:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d08432c627cd3612828dd196af7493e5 SHA-1: 3f17bb8aa8ed987e3b817803a59b83858094fd81 SHA-256: 986f8ec97a97c853950d6edef55d739eec35fd1e78d51787c3588d394b0f1e6b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as a malicious PDF by ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, with numerous embedded URLs pointing to external sites. Several of these URLs are hosted on compromised CMS platforms, indicating a potential distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4270

Heuristics 5

  • 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
  • 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://suavitinhtannha.net/upload/files/22372873921.pdf In PDF document text
    • https://anakaygame.net/calisma2/files/uploads/lowexos.pdfIn PDF document text
    • https://businesslife.com/content/files/zujanagirujedox.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/4507353277.pdfIn PDF document text
    • https://nppmaudaha.in/ckfinder/userfiles/files/84563078247.pdfIn PDF document text
    • http://inistor.com/ufiles/files/nelunurasupikuganibekobi.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140fcc96ea57---zadovijodumimipivola.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/86807461257.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/jogoberelemaki.pdfIn PDF document text
    • https://chptravel.ir/data/file/58032067003.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370f77ba79b---42404628513.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/81b83e4ed86dc53c3bea013c1aa25434/zudilegimulapupafuwe.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/u4p2lngdr5gqqfd89rfbmr97t4/41122309202.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/juwegegikupovemobe.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/ubf79ppdds7nqe8lv8ncjsviui/3035292736.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/zizidugelekuv.pdfIn PDF document text
    • https://www.pollackmihalyiskola.hu/ckfinder/userfiles/files/veves.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/siwuvatobe.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/380730369.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/70042106651.pdfIn PDF document text
    • http://locke-3c.tw/uploads/files/202109160256014645.pdfIn PDF document text
    • http://dges.in/userfiles/file/14733996281.pdfIn PDF document text
    • https://alaskaproauto.net/nbloom/fckuploads/file/vexuji.pdfIn PDF document text
    • http://pioneerbuzz.net/userimages/sozerimuv.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/pufefan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=app+lock+in+moto+g8+power+litePDF link annotation
    • 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_off0000c6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FC 21700 bytes
SHA-256: a3c953f68a46fc80304d2670fe9c482f2869ff7ad6be1c8980253b8c963911a2
font_01_sfnt_off0000febe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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