Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb27a2e9cbae73b6…

MALICIOUS

PDF

85.0 KB Created: 2021-09-08 06:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6c2885337024612c6c82860d1465c451 SHA-1: bfc748449c989ce81f7d00f1660c01e7fbcbc562 SHA-256: eb27a2e9cbae73b624daabd32105fd6ed632bed5fe007c7668ffadd0e9ebbff5
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and potentially malicious content, suggesting it's used as a link farm to redirect users to phishing or malware hosting sites. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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
  • 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://taichielite.com/louis/taichi/ckfinder/userfiles/files/65476431995.pdf In PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf39173e3fb---85488966221.pdfPDF link annotation
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/466fc4b8f71168e83abd565de21b15df/46798274714.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/a46f8758834436d898c985b4b33c9655/82668058463.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/putekirulapuxemovoriw.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16127023d31790---71909779860.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/45561856282.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/wixonufinugudix.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f2ffb3303---11678062001.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/29711763838bc147005f205ea4ef170e/66971991340.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/9952672406.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/9a7541c5386054408c6c344da0889ebf/jafub.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/mudefali.pdfIn PDF document text
    • https://santaclara.com/wysiwygfiles/file/8005248471.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/ddafd6adea86cdc793c016ff3e9a462f/63368937848.pdfIn PDF document text
    • http://whsclass1968.com/clients/f/f8/f849445bb2fb8f42e7c863050dc1ba38/File/fazoguxoju.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/majibadajewalexexo.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/87950472836.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c74e31e044---93229578791.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744074c37c7---kefuxoruvoxixutekizu.pdfIn PDF document text
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/0jvbv1s5cvc44cvfocfri78nc0/28952559090.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/77605954639.pdfIn PDF document text
    • https://attack.lt/images/files/jovobuxupewatum.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/falefebotexuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=sawyer+water+filter+manualPDF 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_off0000e885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE885 10460 bytes
SHA-256: 68c36b21e847c61ea9476f93a3fd6441017b995eec3e5a4de97b3c6a68e11f0f
font_01_sfnt_off00010048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10048 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001185a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185A 17824 bytes
SHA-256: 803f36408f2ca2aacb13d258a785faa0922f083c7317dad27896814d1642b772

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