Malicious PDF — malware analysis report

Static analysis result for SHA-256 c602c06469d7191c…

MALICIOUS

PDF

72.2 KB Created: 2021-08-16 17:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a8e33872ef3cc18e464a9fcdd589e8ff SHA-1: 758db7cebfafe7493cce82dcbb5ed6792b9e2748 SHA-256: c602c06469d7191cbff5b67141ea2c1f554aaa379c104877277dc0a04c000a39
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jjcfurnituremaker.com/userfiles/files/91750270240.pdf In PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/wafunib.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/21853427708.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/5c7bf2c8133070bf933f5df13718b166/wuzipewikoxidoku.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/81762118986.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de16aa8aafc---fegepozutadim.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/fibidememajopelo.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/4u94lnt8i0j73mrm2ultvjk8h1/97815049915.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607b777340556---85840174072.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/nolademovoliwipesitenur.pdfIn PDF document text
    • https://sambelteri.com/contents//files/zimiret.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c72ef1c05---forigomuwefomep.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/tuzorexopekabugitogarul.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c7b2cf4aa---tawesobimawaniregitajeki.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/39e33d5de29b90d251da139bb997e173/momub.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/xifefizogalutomodow.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c96c1667119---95026240503.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/euvrd611h5b1hp0t4bk0487tm0/zubagafi.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/97994865383.pdfIn PDF document text
    • https://xn--faade-mtal-p6a3a.ch/ckfinder/userfiles/files/71557280933.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/jonumafemav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=4th+grade+math+test+worksheetsPDF 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_off0000bc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC01 14564 bytes
SHA-256: 6d34db2e645cf261a0c58a3b9ca1e8282b9b08196eca425f0494bc6d9379e940
font_01_sfnt_off0000e0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D2 10612 bytes
SHA-256: cf9677ff65b1c6ccc4e3981ea6946f89a58cf0febbbe8453a9f76c55eff3fce9

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