Malicious PDF — malware analysis report

Static analysis result for SHA-256 338eb6f48a8bb368…

MALICIOUS

PDF

74.3 KB Created: 2021-09-11 12:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c1d0fcf3d16d0c233c0a3d7db650202a SHA-1: bd01b75ecb1a4002d77965973261627134b903a2 SHA-256: 338eb6f48a8bb3688c366b2c331fbafaefb37dbd413a632cf8fe50ee2eb2f983
126 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm. Multiple embedded URLs point to potentially malicious PDF files hosted on various domains. The presence of numerous links and the 'link farm' heuristic suggest an attempt to distribute malware or conduct phishing by directing users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://hzzxtl.com/UploadFile/file/20210907042614942.pdf In PDF document text
    • http://angelescare.com/userfiles/file/93252321606.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/gelidabapob.pdfIn PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/ziterajetawu.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/kubuvefufalupa.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/43119960526.pdfIn PDF document text
    • https://myagenda.myagenda.cz/pictures/editor/files/nogapupudepixewakere.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/filuv.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/wezumaworarumodun.pdfIn PDF document text
    • http://indigobaby.eu/upload/files/90682555109.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/pipabazilajomirusu.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/gajenafugakoviwes.pdfIn PDF document text
    • http://bgindus.com/t/tutorfirm/uploads/ck/files/32383143617.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/da2cc18f56d4f91576d00ba6fa39c500/bigaxalulutiva.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/sedor.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/5238179351.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/58872828974.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109030902162637.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/8764916997.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/fejakuwirase.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=watch+work+it+full+moviePDF 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_off0000bb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB53 10668 bytes
SHA-256: ccdcc6691179cb3f45b4b942dcaabfe92809b974b216e3e6ef47df4820068715
font_01_sfnt_off0000d3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DA 18332 bytes
SHA-256: 86348f79de108e2aaa2f9ed4b3aa5bc8d4ba49329ee3a72c5b444f627ea4590e
font_02_sfnt_off000103c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.