Malicious PDF — malware analysis report

Static analysis result for SHA-256 5769c8fc5fdc664e…

MALICIOUS

PDF

108.4 KB Created: 2021-06-27 10:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f8249c54ed34bcab6968d6e7a29c9a2 SHA-1: 8a8868c12d9d51bf140d3386227de69b55a71c2f SHA-256: 5769c8fc5fdc664ed004fcdd846cd8b3989e6c2d4e7dbac8439d72bdc3849890
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to various URLs hosted on compromised WordPress sites and disposable domains. The primary goal appears to be redirecting users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/ho19rt31cqt4dpb87deif7b7r6/latogoxitoxivezigefel.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/49e82418a125858b087df9eb9d481774/14046434983.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993b6563ed7---rabemibafuga.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/b8lh5025ho4bqinarlcmj3ls94/26217912124.pdf
    • https://supermagnum-bg.com/userfiles/file/zefabetofofonajovegaru.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9ae70d17e---91791349212.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d6370cb61769dffb01812d15822ee24e/10104793251.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/61491ff81598c69af13908fe02678915/80019730894.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/dqpafj5qr9tlogmu49vr300ul4/81175353467.pdf
    • https://tort-art.ru/userfiles/file/fabimoxokarapide.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/14f6e8a0a019485dabba5fe2d20b815c/viribosepinobivetun.pdf
    • https://keralahappyjourney.com/ckfinder/userfiles/files/webulonavegapug.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608698fde21a5---misug.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d65e7f5303d---pelubebebujelurikiwewo.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/c02njprfm344di92l6ffpvd426/85445098601.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/c4bfa0d0c38e26688fe081ccc883d989/xekokogajoxekazut.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b245d0d09---65858473936.pdf
    • http://aczelzalog.hu/tmp/57512831149.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da7372c12f---bomalatek.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/83648007063.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074807e2ab68---93093650850.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/64ckkjtd8q8mgeea7vhf67qoeo/nupevijopufiturukemegitax.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/glombni42e4j32c3o93rjtlj0c/nowoziw.pdf
    • https://eingangrad.ch/userfiles/files/wifuxawuditefu.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160909e252d396---13256414447.pdf
    • https://spheresignal.com/app/webroot/userfiles/files/47811200759.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=tibia+bicondylar+fracture
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001415f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1415F 16792 bytes
font_01_sfnt_off00015976.bin
854f46bb00afdb1056c9b61dcf6ea58d42c56db65729437c47185796f3934d71
pdf-font-stream PDF embedded font (sfnt) at offset 0x15976 10616 bytes
font_02_sfnt_off000171e6.bin
887cba9f6cea9a3f9db95551f2956f504f87c29508fe105fcd96148d62bf1806
pdf-font-stream PDF embedded font (sfnt) at offset 0x171E6 19264 bytes