Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9f49eb01f059b6…

MALICIOUS

PDF

100.8 KB Created: 2021-07-22 21:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 75f0d7594a2659658c76036e1e08b5d0 SHA-1: 7f330c25d2b0d670f1a40ae47904277dbaa1a1ff SHA-256: 6f9f49eb01f059b65975d73ed4a7601ff1b7f89e1fa08e5c7eda9f2446c0dc66
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links to external websites, many of which are hosted on compromised CMS upload storage or appear to be part of a link farm designed to redirect users. The presence of these links suggests an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

Heuristics 6

  • 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.
  • 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://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a626b803dbc---84217167490.pdf In PDF document text
    • http://xn--e42bt3l.net/upfile/files/93613706071.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/12953896508.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/3u49ckrsnkl1ud9ikg8gmbje45/kifolefuwafifedewotop.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/93658902029.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/lodope.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/9c65fa8be58c22a2785bd1076a1a1e74/98677455941.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021052409063473499.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/55483154420.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/86a8782ab44ade791364cab2f6f1b0fa/53976951589.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609619d90202c---wenajabirakitedes.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/renurupowukolojadugifuvo.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/bakevf07fkudksrsoaop4o76k3/86112680540.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/nurusarisew.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/93619430094.pdfIn PDF document text
    • http://bomtvcloud.com/data/board/file/20210513211415.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/1651hhmugrcli1rkh1g5us5j05/20454512256.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/33653008462.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/tqmhimcpnpv6i84bu06hd74j6o/12397202212.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/tiwesiniwabunudodonoxan.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/23671251078.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/43726734386.pdfIn PDF document text
    • https://tipresentoio.it/images/file/74470163937.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/17749001019.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=definition+of+the+word+palpablePDF link annotation
    • https://mediaget.com/userfiles/files/gozapevawedupumeturafomi.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF666 3032 bytes
SHA-256: 4189d98c23fe2bffd3e240f76844ab0d4b9c301d40aa4d90402b5490f3cb0d15
font_01_sfnt_off000102ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EC 16804 bytes
SHA-256: 550cd7e60caa13d0c92e294013782c8bb090ef97dbac27598cc6fc1cffe5c283
font_02_sfnt_off00011af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF7 21596 bytes
SHA-256: efeeb8e5296e1854351428f22fd4115652193cd4af1e0da42ba0bb84fbd2d71a
font_03_sfnt_off00015307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15307 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00016b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B1E 10652 bytes
SHA-256: 216da3f585e7548ad9e78606ee7380ff322bf67992d0cb3b23aae9aa5b88fb0e

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