Malicious PDF — malware analysis report

Static analysis result for SHA-256 1230c72fe2d59a5d…

MALICIOUS

PDF

70.7 KB Created: 2021-09-28 10:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39bbe659a018689bab1a9b6884c2acca SHA-1: 25f034fe6ce2bd9a951f888af3cfdd28e88414fc SHA-256: 1230c72fe2d59a5d837a35999f63940916b545d58df98b67cf3ea41e2a9a1f44
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest the document's primary purpose is to redirect users to potentially harmful websites. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution campaigns.

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://forexinc.ca/upload/editor/file/gasebusisi.pdf
    • http://fjzy18.com/image/uload/files/vekitipobijiguraneletana.pdf
    • http://mispuntossaga.com/campannas/file/74728587494.pdf
    • https://finliz.lt/i/File/jomenuvewiramavos.pdf
    • http://saluteebenesseresas.it/userfiles/files/nojuviparapujegegepojepi.pdf
    • http://russia-ex.com/images/blog/file/48379902699.pdf
    • http://hawaiisushi.iorderfoods.com/uploads/files/6200920574.pdf
    • http://palakkadtourism.in/ckfinder/userfiles/files/69438955292.pdf
    • https://thefertilizergranulators.com/d/files/94357330970.pdf
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/mujemivupu.pdf
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/bumidoditapefazamo.pdf
    • http://work4shop.cz/userfiles/file/62626707513.pdf
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/79203506879.pdf
    • https://stockbauer.hu/uploads/file/rawirezitapini.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb5b939130---99250862097.pdf
    • http://ugrctrani.it/userfiles/files/wepoj.pdf
    • https://worldpigment.com/image/upload/File/69816866974.pdf
    • http://parzenica-bialka.pl/userfiles/files/karadufosalidanidumarew.pdf
    • http://aarogyamedico.com/userfiles/file/kopigixugas.pdf
    • http://sakesushilakehavasu.com/uploads/files/lediluwoxowamudafuku.pdf
    • http://warehousetraining.ie/images/91593125737.pdf
    • https://regiefranchet.fr/userfiles/files/xijigimaz.pdf
    • https://themis-lex.com/userfiles/files/vigafuzuxirixut.pdf
    • https://kodcomputers.ro/2664/uploads/zebutu.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614d7479cb352---feriwipigegutoj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=chal+mera+putt+2+rdxhd+punjabi+movie
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b402.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB402 16792 bytes
font_01_sfnt_off0000cc19.bin
16d70fce98e2bf5ab04415d7c1511bb63310bf2c5a40c32752889abb49a9e1cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC19 11176 bytes
font_02_sfnt_off0000e5d0.bin
1e17bd41f185a91095bb4eee0158a6c780efe145501a23a234bb5a4c35362453		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D0 15540 bytes

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