Malicious PDF — malware analysis report

Static analysis result for SHA-256 2897e313de5a3b50…

MALICIOUS

PDF

76.8 KB Created: 2021-09-16 21:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ecdc1ecdbd61ef0924e4914bf8597fee SHA-1: 1e936a9cecdb8f106cbc7a1f85388e6cc3158943 SHA-256: 2897e313de5a3b508f151ba869e00f907ce4ef01fbd70c88ea6c0c6ea8baf9ae
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to suspicious domains, suggesting it functions as a link farm or a distribution point for further malicious content. The PDF structure and embedded links are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://soechi.id/userfiles/file/kibuxakew.pdf In PDF document text
    • http://leaguengn.com/userfiles/file///lejibipesolinawabiwo.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/82599157393.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/tuzalir.pdfIn PDF document text
    • https://kenadong.com/contents/files/lunej.pdfIn PDF document text
    • http://nbkhjc.com/uploads/202109/file/2109061723094912865nsppusuc3hi.pdfIn PDF document text
    • http://cnzgks.com/userfiles/file///xepokevebet.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16133dc037bc4c---67188190940.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/kituwuvotufusem.pdfIn PDF document text
    • http://www.egymast-segito.hu/uploaded/fck/file/84718284331.pdfIn PDF document text
    • https://sapporomn.com/userfiles/files/votogufav.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/61523692398.pdfIn PDF document text
    • http://benrassam.com/uploads/files/64356564300.pdfIn PDF document text
    • http://agisinfo.ru/uploads/content/files/37915840489.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/mezitidumorozatu.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/91151808190.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/1115610565.pdfIn PDF document text
    • http://flexa.cz/docs/file/pulagilasasatubitusoleso.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-7/20210907232537751564.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/jeguzodukedepanumijasuzi.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/lifijata.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/84379210749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=god+bless+the+broken+road+full+movie+123moviesPDF 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_off0000be78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE78 19084 bytes
SHA-256: c8467c58277a0ac8064e0498698a5449aae110ecdf6bd2a957d162ab192589a3
font_01_sfnt_off0000f0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E9 11400 bytes
SHA-256: 7857fd25e846913df42f4b736b05d3f201fc66cb3bef11fd01694408519eff9e

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