Malicious PDF — malware analysis report

Static analysis result for SHA-256 02822d47b05493c2…

MALICIOUS

PDF

78.3 KB Created: 2021-09-02 11:38:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9f835366aeb977d3b1b3ca32e4047745 SHA-1: caedcdc4c7f693d7029b2b4a9e5af70855ab947f SHA-256: 02822d47b05493c222066dd4bc71d8154f9089c6cbfb5e7ee50382170f053d38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to compromised or disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple PDF link farm heuristics reinforces the assessment that this document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://acudrved.com/ckfinder/userfiles/files/ponarinuxenosewi.pdf In PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9286338ba5---5095588515.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/b150d5d3de8120c196ed4c571f9674a2/ludifuzizevekef.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/5839549501.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/28076128306.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/jozixewamiwudizovukagix.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/fejowu.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/74690970916.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/03646e1f8b6bd6ad70773c8cff06524d/taragoxosu.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608129f54a0b3---komuki.pdfIn PDF document text
    • http://gestmase.com/media/images/file/fupelotumilusezivovida.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/22915084395.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/63665155599.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ro2dmnf48ods2b9pip0gf5i1b6/nepanuda.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/71061440218.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/33353216210.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/77014104362.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92787227200.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/sosibofawekuruj.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/pajitokalawuwekowo.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/38f796ccbafd53cd8b06d8cccce6c326/75738421416.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd7c0253476---waxavapuxaduxip.pdfIn PDF document text
    • http://mvdeastudio.it/userfiles/files/nilinepusariduzobasekelib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=wood+glue+msds+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_off0000d123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD123 10376 bytes
SHA-256: f7b74a0cc4b6da76aa7b0f7970078918f24790f08bdd1fa38a1de2ec7e867fc8
font_01_sfnt_off0000e870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE870 16772 bytes
SHA-256: 2731870bca25998e5f4cdead80af22bfe3d8bf5f8d6b5d350dfa3d42670b4f18
font_02_sfnt_off000113b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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