Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6e5ff3dc6334b01…

MALICIOUS

PDF

86.7 KB Created: 2021-09-02 09:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 754d5cdde87d956c1a2b6df04dcec3f8 SHA-1: 3f5413145e2c0751ff0cb2c398b87f1b75b430ab SHA-256: f6e5ff3dc6334b0161b22871550da677ff4978e4ee802f13cda01bf0d0b57432
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://allytemp.ru/uplcv?utm_term=shivaay+full+movie+download+filmywap PDF link annotation
    • http://alcantara.cz/data/file/65880885587.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/pevoxekikudo.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/30390194403.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/01bbc67cc0a4f4b1e34870602c98e310/51864724454.pdfIn PDF document text
    • http://zatexpress.com//upload/userfiles/files/35914654878.pdfIn PDF document text
    • http://ashioke.com/images/library/File/65496233174.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111ee6faf985---fanonazalavifakaviropipi.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/malededegatopizo.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/71647899026.pdfIn PDF document text
    • http://firsttimehomebuyerstudy.com/images/file/titijubaziro.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/17726041520.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/komopotubefobodux.pdfIn PDF document text
    • http://airfa.it/userfiles/file/wiguletapizomolivuzem.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/51824126598.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/83183340204.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/letixok.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/85688061993.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/zinavosog.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/66270155815.pdfIn PDF document text
    • http://escalierdurire.fr/ckfinder/userfiles/files/60039505487.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce4553b6e2---jemegudu.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/lumelorilep.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/50060644370.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/topimuxalizejotewerifokit.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/vagidubowekijazapiz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1A 10840 bytes
SHA-256: 7495d24dce03bf48c4f26ec9f67c559415e61d448ad908332498440db54f67cc
font_01_sfnt_off000106f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F6 17600 bytes
SHA-256: 0e8556b932583895ce722d7b76803236678b1b2ac19d05fab8b54d92afa60426
font_02_sfnt_off0001346d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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