Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8377d45789c930…

MALICIOUS

PDF

72.4 KB Created: 2021-06-19 20:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66746b60885abebbc9e749f818cc6008 SHA-1: 31ca454f388736841c4e3ba19ecf243454901d36 SHA-256: fe8377d45789c93014e197fbc664d4407ced87a675a1b6cc7b458103b3547e3a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a payment redirection lure, describing new or changed bank instructions. It also includes numerous links to external sites, some hosted on compromised WordPress uploads and disposable domains, suggesting a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation of PDF vulnerabilities to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://laborke.ru/uplcv?utm_term=can+someone+steal+data+from+your+iphone
    • http://stardentalcare.org/userfiles/file/26741288970.pdf
    • http://kunas.lt/app/webroot/uploads/files/xudomademuzo.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/su43g2ae7v7dnkq4ip4e0ig9f9/rorujoximamizizutumolipe.pdf
    • http://porpora.info/imagenes/imagenes_contenidos/%5C/69222070275.pdf
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/pifufakovov.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/bea3197cf99811aa1cc95555499ffbdc/sevaluvirumewifubodo.pdf
    • http://pphu-joanna.pl/fckpliki/file/sogitafabadonabodilal.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/a53d1519a3794a30f50f71ff6c7e0286/19543750919.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607778b490cdf---90231665569.pdf
    • https://abe-rdc.com/userfiles/file/lutasifutikaret.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf74935ca44---gosefuwasigep.pdf
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/99418058556.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5138330344---72043907609.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/aott2pqo52ap074qfmnt051tvd/lunemo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df53.bin
cf9f6a7e0f53623d5dcdd295c5bced5c3b9851e6b68e8d186137a3319b2ec272		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF53 5288 bytes
font_01_sfnt_off0000f12a.bin
97cfdc15ea004b87e19d5a4b468bd3046de935728742433ff7a6bb66014c3a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF12A 10432 bytes

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