Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b2fd960403255a…

MALICIOUS

PDF

79.8 KB Created: 2021-09-18 18:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d1a25bc5e974043b164dfe2f795618fb SHA-1: 7a6751bed5777945414cd7a2399251c7d0b1e79f SHA-256: 02b2fd960403255a1ca73650b3166ec663edfd335d84607b95a0a4e058d00155
166 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. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document is designed to trick users into downloading a password-protected archive, a common phishing tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613932df10b50---bupolaboja.pdf In PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/50736189561.pdfIn PDF document text
    • https://fong-cai.com/upload/files/77939537195.pdfIn PDF document text
    • https://mehregancenter.ir/images/upload/files/13627875347.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/bidivekanedufevo.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/lakazadumufimaduso.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210901_FC1873F0730FA693.pdfIn PDF document text
    • http://myphamasia.net/upload/files/97311689649.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/80813752097.pdfIn PDF document text
    • https://2winit.com/Files/files/58701726780.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/sogububov.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/69206138588.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/luzuvusexuwuxazoromegem.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210902_99E914EDB8EC8C7D.pdfIn PDF document text
    • http://didongsinhvien.com/upload/files/63232860633.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/66661928415.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/salefa.pdfIn PDF document text
    • http://kelkenaghshband.com/app/webroot/img/files/xalufuduvabe.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/5945862772.pdfIn PDF document text
    • http://domainecomps.com/documents/files/89737711936.pdfIn PDF document text
    • https://ww150003.linebot.net/upfile/files/20210907032634.pdfIn PDF document text
    • http://minhquoc.vn/ckfinder/userfiles/files/lebinigulo.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/9471609447.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=phone+out+of+safe+modePDF 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_off0000d43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43C 10484 bytes
SHA-256: 3d4007b0a57adea591244db8eebe385a0103592ca5cb2b9735ea6ddec989332d
font_01_sfnt_off0000ebe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE7 17876 bytes
SHA-256: 83fab7b2200d6850a351223b955dda39df35fef13250462d2cf1bbca61ec8a30
font_02_sfnt_off00011a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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