Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be04278afc98154…

MALICIOUS

PDF

75.5 KB Created: 2021-09-12 19:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 3b6b0d85961ebf0d6d6d08b49f8d11f4 SHA-1: 7b35760afd46e5257420a647ea508014bd731694 SHA-256: 1be04278afc981546f7d21662727fa6f74a378a0324795dac61566da05d3bd5e
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 0.9947

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://minhanh.com/files/newirarejerogiwoj.pdf In PDF document text
    • https://angkorphotographyguide.com/userfiles/file/minawiwu.pdfIn PDF document text
    • http://bdn10.cz/files/file/62047450427.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/85721597557.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/munufibuxiluleguzesomaw.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/pezilosakanejomiromad.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/35650059997.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/nunumugaxevose.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/fijuferigasokajonogarabo.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/wubivi.pdfIn PDF document text
    • http://innersolutions-uk.com/file/30273973499.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/pulozutanitimo.pdfIn PDF document text
    • https://fengshan-zhennangong.org/upload/ckfinder/files/17903694968.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/7624884227.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/81347881583.pdfIn PDF document text
    • http://praguetransfer.com/files/file/42093797010.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/23133413162.pdfIn PDF document text
    • http://softtox.pl/new/userfiles/file/65021038485.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/gotitowemiwoboxovinineb.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/24275467251.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/pufujatadajozij.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/71497238687.pdfIn PDF document text
    • http://naim.naparts.com/images/fck/file/98094554594.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/24791323188.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021091107534816.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=train+station+tycoonPDF 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_off0000c3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C0 10124 bytes
SHA-256: 543bbfc94fcca33eae8a7daf4b89ee4f69c1bc7867509b1732be02a7084925d8
font_01_sfnt_off0000da89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA89 17608 bytes
SHA-256: 129ea95579f66659b56160bff22ee12b10556e89b3a1d280fc3e0c497806f461
font_02_sfnt_off0001088e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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