Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c14a760ad0602d3…

MALICIOUS

PDF

89.1 KB Created: 2021-09-03 05:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b215cc8a7ad9043577e918c2d7764d30 SHA-1: 81e1320dfee1863f44ca51e69702d1cc137cff4b SHA-256: 7c14a760ad0602d31f204e7a44d5b6cfe8b135cb67178d242ed6a67f899aeea6
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV, identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the structure indicates a phishing or redirection lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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
  • 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://polloricowings.com/uploads/files/dogudanagapu.pdf In PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608977b5ba7a9---79700165307.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/97012999215.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cc3101b8e---wadakedosaborevawag.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607984801ba22---73707888553.pdfIn PDF document text
    • https://adikkedua.com/contents//files/61112365097.pdfIn PDF document text
    • http://heureka-cz.eu/files/tugamitemixamij.pdfIn PDF document text
    • http://patroha.hu/file/46605313214.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/08c81ea94cfdab67c7fd390e8fd04cb0/xurosarak.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/70j4vuevsbo8q5entvlno9a8k6/3310927019.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/ae2b2ff4c2ef5cdabdae15dcf41dfa92/kasijononotigu.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b31fc51767a---16498825701.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/xudoxiseborox.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/76823383414.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/zemujoposabapevowuvi.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/0b3c928db8de1388b4d2cc4236e07f93/50139511048.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c5beb08ba---lapigazamibasusudodo.pdfIn PDF document text
    • http://mysistermyfriendministries.org/clients/85776/File/71878096719.pdfIn PDF document text
    • http://findplusltd.com/file/getokevulanikev.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/wukotoromawenamot.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/38714895515.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/cnaslkrca4mpc0795v7t7q4fna/tefaxobimegawunetamexeve.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/37694199049.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/43124cee032144c2a5c7c4576089e7da/8210906777.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/vusitekaxabojopekasaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=husky+air+tools+manualsPDF 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_off0000f775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF775 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8C 10432 bytes
SHA-256: 0ceadf0b7f50e6341a7035a58e76b0d07bbebb597b7352cba6e2b612f931d518
font_02_sfnt_off00012722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12722 18268 bytes
SHA-256: d5e5ba5b1976704c46ac14f22b65178c53dd9d017237eacf2a8891d181a56fe9

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