Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e7ad5f7c9f581c…

MALICIOUS

PDF

78.6 KB Created: 2021-09-04 12:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ec1c28a6f6606c1b2c7ba3e3f7e56fb5 SHA-1: 95166cc7305f11c991e4f7200bf46dd7fad4491c SHA-256: 48e7ad5f7c9f581c9c977bb66f591eede3d13e0afd0ce677e1b3178f833ff3f7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to download and execute additional malicious payloads. The numerous external URLs, many hosted on compromised websites or disposable domains, suggest a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=telemecanique+magnetic+contactor+catalogue+pdf PDF link annotation
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/89013183324.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/83454292393.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/28470800180.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988c2eba2e3---noxororoxiruxa.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/28597893062.pdfIn PDF document text
    • http://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/xolelabifozujas.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bcffceed5f0---forolip.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/pubumateko.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/9ivm5bdllmf875tldm06kmjvsm/19304414105.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5389898be9---vubagifozusulirusejojobir.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/garori.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/zowopolod.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/97955645538.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/55209963966.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/mogakeditixabaziza.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16075626cb7d01---47258854.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/aknusvo13uk4grqf4tr8s4ttam/52266195810.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160825561d3a48---10684077893.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb78dfd94e9---vokujimokarisugal.pdfIn PDF document text
    • http://teplospectr.ru/images/files/13292670006.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/buraputewefolatop.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/adee0497f67dd1e34d5d2dc80d0a7efa/23932995921.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_off0000cdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB6 17544 bytes
SHA-256: 9ae8ba7e9a6d024de2664a4eb23ea0acbfe01a0cedbdc055b2e0455fd895c9e9
font_01_sfnt_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 11004 bytes
SHA-256: 8462f4464b97aff32ab2919775af7179567096a37a028f7a94f65ebdc22e7f99
font_02_sfnt_off0001146c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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