Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f5fcb3368ecb69…

MALICIOUS

PDF

95.9 KB Created: 2021-06-28 03:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3e3b5bd6a0d4354978142afbf2ed10ab SHA-1: 19fbe73bb29e7ce17d47dfd0429583ae23e16095 SHA-256: d3f5fcb3368ecb695208f0c3221e1092c695a64953c9a824b81145593ba6e8ba
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://urbanconstructions.org/images/uploadedimages/file/xidojoxaxisenosoki.pdf In PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/vuvekixuzerokegusivozod.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/zunibefaletepujox.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba69305f023---zijagodifasidipe.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d63b88b553a---nulufofega.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nrcobvvu98m3nc5qglogt3fjh7/83468792985.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078fc99725d6---66532260630.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/16a0408482d2035b76ceaa111c6e913c/6679058636.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/9kiu3s58r9ge2fpt277rlplo50/62217137995.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/libuwakepeg.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/11065181575.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4024c85f67---171179592.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89e2a64526---feravobomanogofakorozalad.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/9f27324247865c864d06835f0bc9bcad/14292846291.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/66628320477.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/vkt3fn6cdqv7r2t5dasplak9h3/69442318049.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/ffa35a6601a50e426199abc44f436253/9208933872.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/df09ef2272de6f6850e5120622727bc3/purutaziletubivulubo.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/cc147cdad1a03ee5f6f5f32c70e8b064/tadebiwapulezab.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/junovejasob.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160807d9c08ee5---24813584100.pdfIn PDF document text
    • https://tipresentoio.it/images/file/80698531334.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=happy+4+month+anniversary+imagesPDF 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_off00011567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11567 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7E 10904 bytes
SHA-256: e1ebb72304e63acf55b71b8ba4500fd9b988ebdece34305694752182530dd38b
font_02_sfnt_off00014697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14697 17036 bytes
SHA-256: b6b4eadd5f86f9b29821ee416787b4989c190e2e63426cd735a8e4ebafb1e55c

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