Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30b89ad9abf203c…

MALICIOUS

PDF

81.6 KB Created: 2021-08-01 09:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d95bf3eaece7fe2ad725e8a72401c9d7 SHA-1: da443b3e9f9a604779aae046f41bd99523a85fca SHA-256: c30b89ad9abf203ce32dce71f726cdc35ce0d0323479c25639b720025d0f1a58
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs pointing to compromised WordPress sites, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160828fd94efc4---61271239792.pdf In PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/1b690d4b592075680ddc12f66dc8ed14/gakovenafoji.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/asnsmkmnkg8n8p572bqv21dhj8/vapuromew.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00d8395ec8---70420476458.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/pabutifelogudegufopu.pdfIn PDF document text
    • http://arslanemlak.com/E/file/mopisajer.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160996e7ee1d83---peluwewuvosebupaf.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/jaliwevilexigamil.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/00e19f8c81e460ce6b762eeddacc223f/vusajuvadiluzuxesozipope.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/virun.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/81533191947.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/i5ag1s77g05qptpruqefhrnhb5/dexurokafo.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/4569cc39e2ea2c590113d062711b353f/nikokaperosofobo.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/tamutidosenigog.pdfIn PDF document text
    • http://anchor-m.com/js/upload/files/rezoxuretowejabapusavavi.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcd131ce48---fanatugetu.pdfIn PDF document text
    • http://rayer.cn/d/files/34569056778.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/jusidafopadofexemiginopij.pdfIn PDF document text
    • http://canadanur.com/resimler/files/podatudikekelabaluzefup.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/798hbtuji376cg4pka5bm5amo6/48461337606.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/csjj586v038gtnqrp5a8ackirv/81166999101.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/21955199602.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/zifaz.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abfbe684cbd---49408422484.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f847961047---bexesetivijub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=lifespan+development+8th+edition+boyd+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_off0000d9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E9 17404 bytes
SHA-256: dde8538140bbdb2f9de1682d60ad7cfdeda34a81eaa2733f80e16ff5b2cc2892
font_01_sfnt_off00010733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10733 11148 bytes
SHA-256: 5d81fd80d5ac833c913dcea439594dc3c5cdc03eec24f1cdd7063f1b25712e0b
font_02_sfnt_off000120e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1