Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71816808c130a45…

MALICIOUS

PDF

85.4 KB Created: 2021-06-28 20:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 08fcd8b6dc907e04cf1e79da7218427d SHA-1: 59e0169ccb69e5ff471ff62c3be1d52463170637 SHA-256: e71816808c130a45d33a82f57dcc1059fdcd42be756868816f28f9398f91a3b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute phishing content or further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://allytemp.ru/uplcv?utm_term=free+online+spinning+prize+wheel PDF link annotation
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160c74bfe85437---ralakijekiwanutataze.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160c97c8fe1049---sodotizowanotagi.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/9ko7mrmppeiln9njikp57no975/25515585550.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/32560091036.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160890a8ead3be---pabofomopuxunebipuzud.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/32896738161.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/18965615342.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/sikateguviluwuzoduw.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/1177259437.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/52027105094.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/51635538030.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/gelako.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/zonetev.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///42799008481.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/gelizapatilazuxige.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/vanifonojokapepabelap.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2e297a78d---vinukipoxigokolewigo.pdfIn PDF document text
    • http://chatsworth72.com/clients/5/53/532ec3c8dc0e95779814939736d4df6d/File/pegeva.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/84504584107.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/a33fb77df18c3057431b285d1268a886/timegiwunimamomiwif.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210617011310189.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c86c654f5---fopitovetitafez.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e6260cf2b---gefutefixiwama.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A2 10392 bytes
SHA-256: 99d375a32e6e40984dfa08395506e80fb3614b16406e33738fabb8393fc904c6
font_02_sfnt_off00011b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B18 17380 bytes
SHA-256: 30d316e0e5d2d9de484ebf6bae3ea8b28ac20fb5477c3a1350403b17deb2c1bb

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