Malicious PDF — malware analysis report

Static analysis result for SHA-256 691cf2060e492401…

MALICIOUS

PDF

108.1 KB Created: 2021-09-02 16:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 79639f5e285a192aaae14cb8a02bb46c SHA-1: fd71d1094160451aa0d62719dc3539ea37a03614 SHA-256: 691cf2060e49240186a7ba9bb29e5fa0f58e63b0747b7bc1b9f9814cb54eed0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards the use of JavaScript for malicious redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • 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.
  • 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://jurabos.nl/include/editor/file/36757424137.pdf In PDF document text
    • http://www.anjhimayath.com/upload/file/27468350612.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/takodalubigili.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080c152b01d6---31930135524.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/39805624217.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b731be78709---sejuvip.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/c60b29c358f73b929e4f139c471af207/45519801159.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/98954262322.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/69512701229.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/vafaxinibisivuwubedij.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/20081090781.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/2pelkd2mdkj8eb9ncs0boggil9/40413601831.pdfIn PDF document text
    • http://run2endalz.org/clients/2/2b/2b4973775a35d8819257a28a16fdea67/File/5708542449.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27b9a3f40b---ninexilerisuwidotowa.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/14958891409.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/90728645898.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/62cb7f758f42f984df47faf9e4db6ba6/motonawidubixinubixuja.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/67481031308.pdfIn PDF document text
    • http://cuanhuadanang.vn/uploads/image/files/durumedonisijugu.pdfIn PDF document text
    • https://eagle-aviation.com/userfiles/files/rorigoxeronuwaja.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075be36e1104---kokawubi.pdfIn PDF document text
    • http://rogersdesignhouse.com/uploads/files/92439958054.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/40461697781.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/42944658065.pdfIn PDF document text
    • http://thietkeweblongan.com/upload/files/xijuja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=evangile+apocryphe+pdfPDF 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_off00013778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13778 10796 bytes
SHA-256: 72a94c20d08768bb455c1807e4a3a9e7f04d1e520b7303d9203964258e11f111
font_01_sfnt_off00015009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15009 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001681b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1681B 22592 bytes
SHA-256: f5113ed28ad0ce449681fe90d62d8b78eb37ef75fc908614f30d513ff64b9b31

Open this report in the interactive analyzer, or submit your own file for analysis.