Malicious PDF — malware analysis report

Static analysis result for SHA-256 741f54b3c9561385…

MALICIOUS

PDF

83.7 KB Created: 2021-07-01 20:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: adb00ace48dff7e1390983c71f0c9be8 SHA-1: 1a88786ea7a47fecb48fb9b5914deac195768f76 SHA-256: 741f54b3c9561385845604f67ce771afc6d9415b6b35268da7e5ef2a1390b493
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised WordPress sites, with numerous external URIs pointing to potentially malicious content. The presence of multiple links on disposable or compromised hosting suggests a phishing or redirection campaign.

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://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/8v6f3ligjs4b0e1sir29gv8p02/85272166054.pdf In PDF document text
    • http://bigpictureresources.com/userfilesbigpicture/file/78081480056.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/068d8b13c72e98a5e396047e29a107d7/52763015411.pdfIn PDF document text
    • https://isosklo.cz/uploads/foriwavanasuwadikati.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/88429870498.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079d753d3a9c---77289079437.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/5g0p5j1i50kopbc31osr9rr5uf/21311208837.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/lasagemaxalobug.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607aed98e0996---vujadowupo.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1608d245fce357---dukobonarikelokix.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/4fca72e9802bc9d280613160a616c8d1/63632275399.pdfIn PDF document text
    • https://topupdana.com/contents//files/92899765641.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/fazisexebugamas.pdfIn PDF document text
    • https://actor-conseil.com/files/file/79408786686.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/nm4e53li6runjmbdcamm61r9s3/woxebiwaterobetototuw.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/5i8q6oi7l9d9s2fqmte1cr05b6/mosuzokikaxosujupativik.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/60a4dfc881fcd7b945cb2243891691e1/pejigekilorupokuj.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/wosuliwaf.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf4400baf7---rukido.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/bugut.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ac8ad0f4b---xudavatejido.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/fowonaful.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/54816678800f6f9277ca0854326e9bb9/sajitomaweledoraveto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=nse+index+moversPDF 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

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_off0000e4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CC 10248 bytes
SHA-256: 4cae4acb4f7e8529699f585909c2fca86f68495e63a36be6c391abc3119210f8
font_01_sfnt_off0000fbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DC 17476 bytes
SHA-256: 5f3b97cc7d4beb185e68a0bd429de0848faf640d1bb0109254d6874791258cd7

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