Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e426e5f8cae13a…

MALICIOUS

PDF

82.5 KB Created: 2021-09-06 04:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6a1ef8f9157142f0ce8882f46ce1d01b SHA-1: 2a214e681cc6215ad05542ce2ecdfac91e6630f3 SHA-256: 70e426e5f8cae13ac10f126ee52318617163bbb1f7ac81f3d1d540a89fee5e42
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URLs, many hosted on compromised CMS platforms or disposable domains, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure for phishing or SEO poisoning attacks. The embedded JavaScript is likely responsible for executing further malicious actions or redirecting the user to one of the listed URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://catamma.ru/uplcv?utm_term=taizhou+scooter+owners+manual PDF link annotation
    • http://hidropro.hu/upload/nigobewu.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c504ba7c6f2---xomilafedogukazanor.pdfIn PDF document text
    • http://ahchala.com/img/file/xigejuwigusinipera.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/14256326209.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a1221361af4---wirapoxowadubixelatapi.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/wafataxupobupixus.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160759c97ef899---tomotagofijaluzupezumaper.pdfIn PDF document text
    • http://clase86marista.com/clients/25276/File/12874504119.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/bosomipofamomesigikugaw.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/a2c38l72v3pthag2or0u6j4o97/tafenele.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/86d563db661e5b2b41a1761c0b62d04d/64565649444.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/45393267372.pdfIn PDF document text
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/panukafijo.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/27235080885.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/aj9h3omfvka9k8pv3aqefvilmr/57608111307.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/tomeverax.pdfIn PDF document text
    • https://wita.lt/images/files/4038355231.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/57c5b88507cffc394b3145a287361a2c/90789118512.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/fasunakobaz.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/c9000cd3830df09d828a3b2dfb57fc6c/67735204885.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/qrok3832qdd30emflsbnu1ik16/sipanik.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/d35a680980c21b18ca08434bd5547733/woxiguzojopuvukapobobu.pdfIn PDF document text
    • 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_off0000dbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBED 10704 bytes
SHA-256: 7ba6c8fe44c91632937a16e6b4a2518f82716943ca9617f5192296a0a0c89e35
font_01_sfnt_off0000f473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 18268 bytes
SHA-256: 7789baec918fb88c2f5acd4b2faedeed2f8126ef604c6ce0d1d18328a44f223d
font_02_sfnt_off00012475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12475 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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