Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07d148e04ca936a…

MALICIOUS

PDF

69.6 KB Created: 2021-10-01 00:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ded0e159fd7694ccfe19c5578aee9005 SHA-1: e463d19d4cb67687d349b5aca8df39ae3ea85325 SHA-256: e07d148e04ca936aa20a4c2ed9fbbccb20e2cb9f9d02d479c4072a1627503fb1
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable domains and exhibiting characteristics of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/vojuwopowo.pdf In PDF document text
    • https://discovery99.com/userfiles/file/11051834527.pdfIn PDF document text
    • https://haruhonpo.com/upload/haruhonpo/files/58538865538.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/posafosanapawarawopega.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///borerafekugafit.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54342577255.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/fabid.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/1683533979.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/sqafe7sgoqimtfot1hj5c79hno/pujefagodawigitaninuwat.pdfIn PDF document text
    • https://cantellodetersiviprofessionali.it/uploads/file/patigopiziselowa.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/gerifa.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/gurabijovapabovuvatozow.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614180be0b83c---danijem.pdfIn PDF document text
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/jufufemalaw.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/vuzikoneja.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/duxik.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/56343457435.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/megujitujosuwizegetepaso.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/35332132039.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/8001804348.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/gekuvilolesomikupedagax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+can+i+edit+my+videos+on+my+android+phonePDF 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_off0000afce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFCE 10988 bytes
SHA-256: ccb61955af9a424e8a9a9518cdef5cd49661f22663128477c8a327a44ecf601a
font_01_sfnt_off0000c92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92A 15452 bytes
SHA-256: 31d76687be31abb30eb7cde924446089c51edbcdbf55ff32ec9c99a8b28c8b1f
font_02_sfnt_off0000f066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1