Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6fa28fa6777a64…

MALICIOUS

PDF

76.4 KB Created: 2021-09-08 06:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2e4c3725f522b4bf21fd9d48682f80d7 SHA-1: f8e0e86f0abca29c9c16362bf16eb75c3ea65c6d SHA-256: 6e6fa28fa6777a647ec4fcbb6e737bdcd167cb9f9eaa07c7f5d97ce839d7c3ac
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are flagged as potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the interpretation of this file as a link farm designed to manipulate search engine results or lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://newabel.com/ckfinder/userfiles/files/simabesav.pdf In PDF document text
    • http://metalzilembo.it/userfiles/files/jawategafejepilo.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/74125770542.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc09ca50493---soxiw.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/61853316172.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086884105db9---vinelabipiruven.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094426ee4e72---31808438827.pdfIn PDF document text
    • https://mo-space.space/web/img/podborky/files/51028034941.pdfIn PDF document text
    • https://bselink.com/userfiles/file/8981655117.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/rufonof.pdfIn PDF document text
    • http://m2m2design.com/userfiles/24489356677.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/totibi.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613460f21fd08---nudarape.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/66542120184.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/078a41e705ebeb5c0b18bc8c3a32c678/remopejunodij.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/24193730357.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/3b0c5c9d007d9aab7076277ee26d08ba/namamam.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/402c6853552b003b1d249a125b8b416b/kapedinadafini.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/jv7co3vs5k5ln8n71dl1jo6hgs/wipotopugumifiwifu.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/xoxofunegawajo.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/c353ffd017ac49d828d625f5ebb60e3f/xibesafozoto.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210830_100201_1208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=amenitee+universal+angularizer+ruler+user+manualPDF 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_off0000c2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A2 18120 bytes
SHA-256: 6e9d85cb185f999059ba9b25be6bd65602cdb028eb4b25b19c61caeed8cf1826
font_01_sfnt_off0000f1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B8 10540 bytes
SHA-256: 4a063a25a9ed78c7b8eb0024fac67622e6e220deb9e7bcb470ae96ab7c29ec84
font_02_sfnt_off000109c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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