Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65d4fb2e04a35fc…

MALICIOUS

PDF

76.6 KB Created: 2021-07-04 02:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 94f90c267691f1147de7c10b50c166f4 SHA-1: 9af604c88cd1122eea9ff46b3ac1ccb880eb00fa SHA-256: a65d4fb2e04a35fcde0e3ec9130d529150df14ba522c1c36301d3bc427e477ee
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely to distribute further malicious content or phish users. The presence of multiple external URIs and link farm heuristics strongly suggests an intent to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://foto-video.ch/userfiles/files/10990032003.pdf In PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccbc73545f0---6204283525.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160821e3da81a0---ranafuxewudikajaket.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/23914535283.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c01fde9981---regixeposasusuzelopu.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/jozidimevuxidosezexutij.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/fuxanogokifuz.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160ccfdad5fc82---83467666932.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/51369396947.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609983723edaa---lunibazijuxifozopuzegiwum.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/b44edb86c11018f3e57782814e6cc811/gigunisapedexozaloboteluv.pdfIn PDF document text
    • https://digireg.dk/upload/xojup.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/u04oi9k26or4lnsrrs0qkckb50/kafiz.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/kogatawigugupof.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210612_5C1D46A300B9FA54.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/7aqap67dbfgu5e5vqj0erkkk35/kazenigifunipovivamon.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a6a4e2301---24548164148.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/jeluvitofokusizew.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/2553bf6a16ce914e985983d06e29114c/96030221320.pdfIn PDF document text
    • http://ckpak.com/fckeditor/userfiles/file/71785065530.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/74254330537.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0775885d4---pagifebefux.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff4eeebfac---bibebemisusamomikob.pdfIn PDF document text
    • http://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/20302672034.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210701180022670.pdfIn PDF document text
    • http://4bx.pl/public/file/2545085555.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=power+of+the+subconscious+mind+free+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F0 11004 bytes
SHA-256: e9425c2b7277233d1f72602b4dc70506915c7c1f3c91ec6261286d0e1b6a228c
font_01_sfnt_off0000df30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF30 16940 bytes
SHA-256: 4ccf42fadedc713cc8d1c3850ce6fe20ad59fd0072b306b1f93a5593adcd07d0
font_02_sfnt_off00010ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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