Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e464347ed7d8d3…

MALICIOUS

PDF

82.0 KB Created: 2021-09-09 22:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e001d49451dfc88bcefba062deab2d05 SHA-1: 33ce7fb02f62df49b1a7747d39533b53ab668de9 SHA-256: 01e464347ed7d8d3726baa16c14d6089cacab1985355ed40bb944fca1fa0765e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the PDF structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://crewmak.ru/uplcv?utm_term=national+lampoon%27s+christmas+vacation+streaming+free PDF link annotation
    • http://tsuiteru66.com/userfiles/file/70405959895.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/witixupiviforuv.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/pabiladofe.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/jidabubupurebuboliw.pdfIn PDF document text
    • https://f2h63c2.ip4secure.net/upload/files/78563493765.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/75131909386.pdfIn PDF document text
    • http://ilsungwarehouse.com/userData/ebizro_board/file/gerinubudezelowag.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/mituzederexopilile.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/jugobegaj.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/59276231498.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/pepudifagenozokejajigoki.pdfIn PDF document text
    • http://gurolmumcu.com/userfiles/file/fobofugobunesafeno.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/legumutitapowa.pdfIn PDF document text
    • http://photonart.nl/phpcmsys/file/rexixediw.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/31321397844.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/dexibulidetifoxenadenavup.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/dobupuripazalafowoviro.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/010951116449.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/23634377726.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e434ddf57---75154433425.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/riboxak.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/wopobu.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/48739841835.pdfIn PDF document text
    • 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_off0000da8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A1 17860 bytes
SHA-256: 40df73e1a878a61096f0b0379af1af06d85519720bc7208da539fd59baee54c4
font_02_sfnt_off00012105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12105 11004 bytes
SHA-256: 03ac0c185fdcb9bd75f7d06d48f07e92f92f2bed6318ed299fd3c2c167fb18dc

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