Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b668ab60da0c4a…

MALICIOUS

PDF

80.3 KB Created: 2021-09-16 19:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1bc2a297b8de69b9626d54a1081cc246 SHA-1: a354c5743951c138bb45046e1c33de5f018f7bc5 SHA-256: d0b668ab60da0c4addecdb532061d6bf7b6043dbd3baa0fafa67be25fc9ca272
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to lead users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://avrig35.ro/uploads/fck_editor/file/93141407503.pdf In PDF document text
    • http://behtarinekhodetbash.com/files/files/67367099817.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/jagomuvadosuba.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/xalexiwapojofogabezinov.pdfIn PDF document text
    • http://poliinc.com/upload/files/kanawi.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/tebatalavuxurotafut.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/97208685297.pdfIn PDF document text
    • http://bacsionline.net/userfiles/file/93105023736.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/tukujokunixorilawutixux.pdfIn PDF document text
    • http://chineseclothingonline.net/File/rozunitaxiwep.pdfIn PDF document text
    • http://wxdyzs.com/userfiles/files/9658669963.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/40186921107.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/suvesemetabofutexaseg.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ea4518029---38587379488.pdfIn PDF document text
    • http://nzozkrowodrza.pl/uploads/editor/file/malazewovuxapo.pdfIn PDF document text
    • http://come2menorca.com/images/file/dejorabaxevufedawuv.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/85603078102.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/borapamegilafamoragap.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/nopazuwoxekif.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-4/20210904015417498131.pdfIn PDF document text
    • https://bor-diing.com/upload/files/10644234488.pdfIn PDF document text
    • http://velo.hu/UserFiles/file/kobufelilenulusak.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/45615820583.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=gtv+live+cricket+matchPDF 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_off0000d5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E6 18092 bytes
SHA-256: 9c2015b75487cfb35c9defc3ab15b6958bc9d356ab28be1ee60758a40e84be34
font_01_sfnt_off00010483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10483 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9A 10300 bytes
SHA-256: bacddf9146de85cf67e0295538965476b46711ab1eeb30587b0eadb9e5cfde0c

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