Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc24e5ed4bb8765d…

MALICIOUS

PDF

84.2 KB Created: 2021-08-13 01:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a689092e016422d9d4002979178403db SHA-1: c040fcf33cc875c1bb75adde28e1a0b44b2921c9 SHA-256: bc24e5ed4bb8765ddaf5e190ce4aba129860b1d5c15480d38b6e3925387981e0
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are likely intended to lure users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160adca5f0a087---46447212866.pdf In PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/8asgh4j5qn3la5knjnfs4m6k97/36896954002.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/206fe07b137ad49926a73a0a6cbcf4f1/gurapexibu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160879d7976abd---40669936894.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/6e96eaff420984c38ff8f58245d2e5f6/zogafegifiviko.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/20049354553.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbbc5cb070f---793664794.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/50bboj5a8hfpsjo23k5qfbepdv/nazejumet.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/1265877343.pdfIn PDF document text
    • http://bhs1966maui.com/clients/64750/File/xodasenejis.pdfIn PDF document text
    • http://wallacewilliamsfamilyreunion.net/clients/6/66/662ca4338cd1fa41fa93b88222973dc6/File/59390996865.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/jalujawezipivu.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/dfeb229664c916faa8f3dff1c2a07abe/koderuropofokoj.pdfIn PDF document text
    • https://edinburghpools.com/contents//files/muzejunezi.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/maduzemem.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cae1978c0ae---buladoponilakuku.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609baac4e1e03---78855659211.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/kimupogata.pdfIn PDF document text
    • http://improntediteatro.it/userfiles/files/82011184579.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2d40217476d7fdab36a16abaaeb7da24/pikenezanesemeronalije.pdfIn PDF document text
    • https://fuoriscena.eu/file/noxumi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=ejercicios+tipos+de+oraciones+impersonalesPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/4ebea9e7a4c1d61cd1ea119349ee398d/95784911791.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_off0000e286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE286 18432 bytes
SHA-256: f14c636c2eaeb2aac3111da9f4fd678999a9f243f7bc606881390bac6f0ca4c8
font_01_sfnt_off00011155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11155 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001296c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296C 10788 bytes
SHA-256: d5c299f9738491771e76a09fafc224305bb2cab0a58efb6a1911dd23f23ac533

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