Malicious PDF — malware analysis report

Static analysis result for SHA-256 019d5902cf163cc5…

MALICIOUS

PDF

81.7 KB Created: 2021-09-15 23:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5b132b7fceb17cf84b25d8374794c681 SHA-1: a3dfe024be04f44c90b912e6f0cc1ca9d454d350 SHA-256: 019d5902cf163cc533142f8f2ca78f0aca792cd88046669e0d48bf55dd5ac9b6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vegas-shop.net/uploads/files/lanexanavibupodi.pdf In PDF document text
    • http://strahyi.ru/images/file/13588416736.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/gowurixu.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/e6a083dc2ea694b90c8e66f4fa606c4a/5808829226.pdfIn PDF document text
    • https://paramourpourbebe.bettygagne.ca/userfiles/file/37512228335.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/86903427518.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/rovegubimilugogezumeloram.pdfIn PDF document text
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/30893369952.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130981d27b9c---kotokozitiwagob.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/duroboganekaf.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/78727790802.pdfIn PDF document text
    • http://medeeatour.ro/mm/file/nozeguradifilisirizu.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/sebilisegibijixan.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/rofopudox.pdfIn PDF document text
    • http://rooptex.com/uploads/refeferanilimaso.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/josoxuburivizaraxugun.pdfIn PDF document text
    • http://psychologadamczak.pl/userfiles/file/rudokibavifore.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/xovamamekeveputuguduwu.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/4882390695.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/41492550891.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/wekizavinibiderawoveke.pdfIn PDF document text
    • https://dom-titan.rs/files/fevofelazamitafomubege.pdfIn PDF document text
    • http://sivam.pl/files/file/xidaduneponipexo.pdfIn PDF document text
    • https://rajatotogroup2.com/contents/files/nirixeximulasofezu.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/kamibutotalovuwupoxol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=which+is+best+shooting+gamePDF 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_off0000dc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47A 17144 bytes
SHA-256: c2cf2c069f975b7ffcff542a36908ba5d60ee0ddbaebdd5405c9959a95324dab
font_02_sfnt_off000120cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CD 10664 bytes
SHA-256: c3a8ec6550d6c060d771521f684cebb4d8c9ac0199415739243088f8e98ec74b