Malicious PDF — malware analysis report

Static analysis result for SHA-256 003a3d7addbdf98a…

MALICIOUS

PDF

82.6 KB Created: 2021-09-18 11:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 32a2e45114e98d8b776e39de020aad6b SHA-1: 27ac51d13f627b803dfe7def3189a143f1d00999 SHA-256: 003a3d7addbdf98a577c57efd91dcdef7da49cd3e4dd9ab42da0c4d032ceeea6
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external URLs, with several heuristics flagging it as a link farm on disposable hosting and a random URL link. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=omegle+video+call+chat PDF link annotation
    • http://lumieretvie.com/userfiles/file/gatigejulogelemuvus.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/71961296044.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16131a571461c1---jozejipejajeja.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e4bad249587e248233e604c20a1ff8b5/gasanapuvogotepavam.pdfIn PDF document text
    • https://mmtours.si/uploads/90579392276.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/97161388756.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/80634709983.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/13296855380.pdfIn PDF document text
    • http://ieeepes-thailand.org/app/webroot/files/files/fogipowudotinapedaj.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/dimumuzeremepuga.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/bibefokozixalobaxoza.pdfIn PDF document text
    • https://tkbhanna.com/ckfinder/userfiles/files/68238243270.pdfIn PDF document text
    • http://kunbot.com/upload/files/mesopomebexaxujuwobalos.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/popuwetimosajomanopupeges.pdfIn PDF document text
    • http://lucidareemantenerepavimentifaidate.it/userfiles/files/xanuvekakekikov.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/xavawabuvenozexaveme.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/21193318371.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/dawulupikatitoroxedixuxit.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/bizuj.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/lenemulelunuparodexajab.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/81790404828.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/wuliliwasok.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/xoxol.pdfIn PDF document text
    • http://qdcmd.com/data/files/50497527070.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_off0000e1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BB 16784 bytes
SHA-256: 7fc56dbafb0f07a84b876a2b52814ea19443dd059afc8b03d963f0bd250220e0
font_01_sfnt_off00010d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D04 10536 bytes
SHA-256: bf03cc6d96ada380b4fc0605670d9f87febab0e3605994b3203127945247ca5f
font_02_sfnt_off000124d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1