Malicious PDF — malware analysis report

Static analysis result for SHA-256 35fc86331fe44f43…

MALICIOUS

PDF

52.8 KB Created: 2021-06-19 04:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 189c3cd5795926760bbede8e4bcd723c SHA-1: b252b8541c2901252475ddb36cd05c309324ec81 SHA-256: 35fc86331fe44f43b0a6b66a0ff61976687304910da03ff3e4253aa4ee8f1878
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. It contains numerous links, many pointing to compromised WordPress sites, designed to trick users into downloading further malicious content. The document body, though heavily obfuscated, appears to be a lure related to downloading MP3 ringtones.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8758

Heuristics 5

  • 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
  • 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://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/h008rna8abq30u40e1l58t4n56/6438173641.pdf In PDF document text
    • http://hasyo.net/files/file/59010666890.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/lupexibajuwas.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/136c32e745eeabfd6ed0985e2f7ecdb8/wifupujanifirupufafij.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/povakikikalumuzik.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16082a740e3306---89571257752.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/menopi.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a669231783fbe913d4a2f52c0338116f/72535980867.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a183827d7e---74385846921.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/ruredapiboz.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a4fa20154---jusiba.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160852f63b995d---fogedefojemidemon.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160abbf183523f---widamejamuserawakogawipi.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/3187bda6c35e0656073a1c9afffcb083/43874587464.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d65550404---1802054537.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/dfd3b9afcf226b25f962d5594cec5989/90394190325.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/sdmcp29rkcv1blkbhiles22jv1/lilurakenobapije.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993b6edd114---86571173995.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=guru+brahma+guru+vishnu+mp3+ringtone+downloadPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDE 5860 bytes
SHA-256: a120d8a392eb1934b293c059eaf4bba863a3f2218af407781ceef67ec00c0e1d

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