Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a2853c0fc78bf4…

MALICIOUS

PDF

95.9 KB Created: 2021-10-09 12:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 86fc313e4e47ce29ec876d8d7c416530 SHA-1: 0aff72faa16dae8cc0f7966d504a5b4e8c533a8f SHA-256: 96a2853c0fc78bf4620d6a8a87cef03502ea4b7e582bc9152f454af55a8ac5d1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The presence of external URIs and the link farm heuristic suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://powercleanperu.com/cms_powerclean_2015/sgi_userfiles/userfiles/files/regudesuzapumudutu.pdf In PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/wabotojabe.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/gezexad.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/gegejugodonixegasemik.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/47680785677.pdfIn PDF document text
    • http://climtech.com/files/files/54116426061.pdfIn PDF document text
    • http://rs-entp.com/upload/file/daturumaxuvabekabibizur.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/zupoluxapolemoduwo.pdfIn PDF document text
    • http://taociren.com/upload/file/210908232050181377fsfpa9julghs.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///lodox.pdfIn PDF document text
    • http://chipgene.com/image/files/20210926_042021.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/xixurato.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/98382055917.pdfIn PDF document text
    • http://esipro.be/userfiles/file/modazepejifufozo.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/gomanuvu.pdfIn PDF document text
    • https://kawanmto.com/contents/files/27931588011.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/89498440551.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecf4cb2e95---pidugazokezinimezu.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/77567955905.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/74557007347.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/57857393438.pdfIn PDF document text
    • http://panel2conso.com/userfiles/file/38467986526.pdfIn PDF document text
    • http://kleinschadenexpert.com/userfiles/file/64637383077.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/65644858511.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/10048157963.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=why+do+you+think+it%27s+important+to+study+historyPDF 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_off0001102a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12841 10812 bytes
SHA-256: dcbfcab880f96d9b2c657a194ebf8bcdb940da099022fa0c2b03889994306aeb
font_02_sfnt_off0001410d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1410D 18600 bytes
SHA-256: 6812e063ee12cdc9183028e8c559b11b4be74ef4ea55ba2d09706f88987bbfa1

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