Malicious PDF — malware analysis report

Static analysis result for SHA-256 6496250d70e4549c…

MALICIOUS

PDF

82.1 KB Created: 2021-09-16 13:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 10648d42b41b541cea0a2818e57d046a SHA-1: 69307f33b35355c2c5f7ba421c85b567c296fa83 SHA-256: 6496250d70e4549ce2de21e54402e763fb85a0effa00bf6a013f22e6b4cdca70
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely involving exploitation of PDF vulnerabilities to execute the embedded JavaScript, which in turn likely leads to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://huntic.ru/uplcv?utm_term=killing+eve+season+3+putlocker PDF link annotation
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613bce10d4042---49979026723.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/52567684754.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/38670507271.pdfIn PDF document text
    • http://pharmorgsyn.com/upload/files/78282193169.pdfIn PDF document text
    • http://diakmelo.hu/ckfinder/userfiles/files/gitofasulaxujanupiw.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/sa2jmd6tq3a2sjoqp6nlc34r66/tarusidubuxavipesasu.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/jezob.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/kojufavofuradokezuxunigop.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/janafeluvejeku.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/dolenalirorak.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/f25538e6a2fcd0cf9890fc0fe437a284/33654290261.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/69790883890.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613041db3fdf0---zuvomorilovojufomafojuz.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/73301922764.pdfIn PDF document text
    • http://15881588.com/ckupload/files/64642145835.pdfIn PDF document text
    • https://baongochoa.com/upload/file/jinesaju.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/50998115985.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614220bfdd5e0---93051019221.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/61358117067.pdfIn PDF document text
    • https://tsolisp.com/files/file/73134895881.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/gifibetunomodaxo.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/degofugo.pdfIn PDF document text
    • http://expnavi.com/sites/all/sites/default/files/file/71788218676.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_off0000dbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB8 17540 bytes
SHA-256: fa3a8b9e5d7706eb14110a3e74defdda247a24ad1721fba80fd5c0ea686713d6
font_01_sfnt_off00010912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10912 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12129 10968 bytes
SHA-256: bde0d2a0338fc8e61a619aba1fb6f7d7290ac3a6abd5e0bd947ee42f668bbc79

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