Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9aaaee5a8dd60e…

MALICIOUS

PDF

93.8 KB Created: 2021-09-19 08:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e497d0e2afcbcb0d5b549c1f070bc855 SHA-1: a5697dfd3a8367d210eff0292f303f8986b6b8cd SHA-256: 6d9aaaee5a8dd60e720d3e35a1cbdf0a1e1be06d4f250bc84b0909813ed4dd42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely attempting to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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://ketchas.ru/uplcv?utm_term=adobe+photoshop+cs6+full+crack PDF link annotation
    • http://riggi.ru/userfiles/file/tifofuzul.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/rorisawugepozujezat.pdfIn PDF document text
    • http://zaiger.ru/img/file/3554383499.pdfIn PDF document text
    • http://japanbizkorea.com/userData/ebizro_board/file/54432633213.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/xudigodukoren.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/pl02nhh24igb652lptigqodh3o/31207271342.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/f66f98ad42fe199ca819a822283c7732/26598082045.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/90754705345.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/5765345318.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/61698163208.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/58068417026.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161469f97c69b5---povodubati.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/80045170498.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/pokibitejolegiw.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16145649ef0a03---demidexujazumojusudodi.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/46008225593.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210908_100934.pdfIn PDF document text
    • https://seikai.jp/free_images/files/83614293326.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/57k38s8mpmgdqrhk63a14fbnik/lazutupidopemagilake.pdfIn PDF document text
    • http://kleinschaden-expert.de/userfiles/file/kedabamijurudoxilu.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/wadilixetebusutidoseloji.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/75090838832.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/29252973491.pdfIn PDF document text
    • http://yanartextil.com/firma/files/lusavup.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/79515495923.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/29138599583.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109140514431065.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE68 11000 bytes
SHA-256: 6a2757bf4a36304ab2c71333bed8883dc17ce0605268a9b07eb683258347f3ab
font_01_sfnt_off0000f7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11011 25328 bytes
SHA-256: 77301b5323c9db39a66742575c651d8a3198b85af0c40de8967f715990dbfb9c
font_03_sfnt_off000151fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151FE 16408 bytes
SHA-256: 30769e46ac94f1de3feb89b8e6d0501a3549431799ab7f21194c1cca520c2b78

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