Malicious PDF — malware analysis report

Static analysis result for SHA-256 0787a546dc556bfe…

MALICIOUS

PDF

84.0 KB Created: 2021-09-12 00:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 025bc557671716c48aebb760fab3141e SHA-1: 7cbe4fc3564985ff973c1c840c95387453dcbcbf SHA-256: 0787a546dc556bfe4391f0536a44da1f68edaff3346efb44149654b0cadc3a50
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://sunnysolutions.it/uploads/assets/file/23256090967.pdf In PDF document text
    • http://metrocars.london/survey/userfiles/files/povigiwunepuwa.pdfIn PDF document text
    • http://sdes.in/uploads/4219658628.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/67496205574.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021090700473673499.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/57705047316.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/66998461949.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/55933220679.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202109060656223939.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-11/20210911061417913886.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/71320726599.pdfIn PDF document text
    • http://sgpeo.pl/users/file/40081308934.pdfIn PDF document text
    • http://isemya.by/modules/ariol/static/ariol/ckfinder/files/58345820170.pdfIn PDF document text
    • https://wsbtitan.com/images/file/88149227747.pdfIn PDF document text
    • https://ist-lb1.istanajp.com/contents/files/98646520583.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/rololumesagagevojojopip.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/samasusas.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/1471700955.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/92638301371.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210909_D6A0555D715AC692.pdfIn PDF document text
    • http://ave-france.com/pics/files/wesinoresuvutowaxibiwugux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=ios+native+frameworksPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F0 10524 bytes
SHA-256: 15c8450bd897f20a1dc48b2b1779615c830db8c10735bd90ae8bc8873bd0b3db
font_01_sfnt_off0000f901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF901 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11113 19264 bytes
SHA-256: fe58d09280dbc2cf1a79288be9bbd16efe5f9a363ad6e73deaf6cc59b9f94bfd

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