Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc0d0d16241de04…

MALICIOUS

PDF

83.8 KB Created: 2021-09-12 14:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8eb1d93a471ce91d7d148f96347c7239 SHA-1: d8255f1caf2203ea27ec0488851c88a2b8e736d7 SHA-256: 0dc0d0d16241de0458ca5299ea2bb338cc01bc5cf35e23b79f2801728fd77c1f
126 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured as a link farm, indicating a likely attempt to direct users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 http://qbcar.ru/ckfinder/userfiles/files/60243170222.pdf In PDF document text
    • http://staractivecollection.com/resimler/site/files/73349064613.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/nonuzububiku.pdfIn PDF document text
    • https://loyallcanada.net/editor_files/file/57766387120.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/ludutozewebomanufa.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/56568590688.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/jegogiwizel.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/rupag.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/wapefaxinudugisedenobete.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/seranilaruxa.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/zeroxufu.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/xepiz.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/83379014497.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c912a1cdf---tixufirewub.pdfIn PDF document text
    • http://steinbach.casawell.tw/userfiles/file/moweruwasutolewogujunad.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109091010095256.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/nofijokexedodepaju.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/5530070584.pdfIn PDF document text
    • http://xn--80adic7alej3d.xn--p1ai/userfiles/file/zagotivapipediwezaziko.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/ziwujidatepaxalanigu.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/51262570778.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/36027368825.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/84190461807.pdfIn PDF document text
    • http://whipitleather.com/userfiles/file/kezizetujekasewewa.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/wodaboxitizuxojunogixuj.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/fegax.pdfIn PDF document text
    • http://apvn.info/userfiles/file/21040491207.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/zagabadep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=biggest+game+in+play+storePDF 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_off0000e3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E5 10764 bytes
SHA-256: 0d2654ba5c45af4d6fc30d77df61476db7e6fba721fed65adaa97ed0c7393151
font_01_sfnt_off0000fcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAB 17256 bytes
SHA-256: d30ac341bd2ed2f8a32938f75dd5b03b75c6a8cc810eacb7bca83274cf0d6203
font_02_sfnt_off0001296e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1