Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fa7f11f790873e…

MALICIOUS

PDF

72.5 KB Created: 2021-09-25 11:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5fe210d35b13d82f29411800c1147f0e SHA-1: 2cdf51fe62133b3cd225f09a29d4db6abf776b36 SHA-256: 49fa7f11f790873e36410b7c3e6ce66a015859f901989c2a9ac271e03bc8ac7e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identify it as a link farm on disposable hosting, with multiple embedded URIs pointing to potentially malicious content. The PDF structure and embedded links suggest it is used to redirect users to external sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://185.33.116.145/~acus01/upload/files/nerelegotugolat.pdf PDF link annotation
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161496c9e512be---wavazapeza.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/kozarazena.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/29865431181.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/4708885392.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/jozulefabejowejudefodu.pdfIn PDF document text
    • https://0900107678.com/upload/file/lisepabifuputanizo.pdfIn PDF document text
    • https://svenjakretschmer.com/ckfinder/userfiles/files/rojulovemajukujix.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/nenubenada.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/99896691076.pdfIn PDF document text
    • http://millionsdiscount.com/mo_images/files/kivinuli.pdfIn PDF document text
    • http://patroha.hu/file/12894175666.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/nawasapalirotorasulonij.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/19700752185.pdfIn PDF document text
    • http://mestav.sk/uploaded_images/file/misen.pdfIn PDF document text
    • https://sibois.eu/userfiles/file/46308526958.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/tomefanifosobubetuvid.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/1v72u0icl3o5uao43b5f7ve873/25235533043.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/27412931382.pdfIn PDF document text
    • http://peter-crooks.com/userfiles/file/nizotitotezede.pdfIn PDF document text
    • http://sor1310.com/userfiles/file/supozifo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=best+iphone+mmorpg+2020PDF 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_off0000b2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC2 18568 bytes
SHA-256: 0cdb641d78e9db1fbc06638849069b6df2d27f9cfc200b127f1e6e8d0d69d950
font_02_sfnt_off0000fa80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA80 10788 bytes
SHA-256: 22c0c7ba946ad1138848e3e2687c5fed8d630cfd10f8f867b5813a05b63a9f7d

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