Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73ecdf2848566a1…

MALICIOUS

PDF

85.2 KB Created: 2021-06-28 09:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4fdaee22ed47c3d6aa3cdf4e6e5aafeb SHA-1: 8b081276f78c274e2a21b321f641e4a818415bd6 SHA-256: d73ecdf2848566a129e3220e916eb635c9105704138e4376e4a202e3035037ef
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs that likely lead to phishing sites, suggesting a spearphishing attachment attack pattern. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=stop+vs+trailing+stop
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607570e4315ed---99976770528.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608687a13e5fe---34061461330.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/hp4cmbl5l3mrukr5mopdkkjev1/26399409609.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce9adc9005---20557376329.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf997ab7ffe---zetebajuvirogufizasizo.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/f17d1c7678c2e2830b437b954e58a852/41263275426.pdf
    • http://studiotecnicofrisoli.com/userfiles/files/tilawebemi.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8613d3aa2---vuruzuzefobin.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54164a52ff---14504192596.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01cc158287---vekisunilap.pdf
    • https://85097781.com/upload/files/66975168528.pdf
    • https://gizaviation.com/uploads/files/32279481364.pdf
    • http://hawks79.com/clients/85064/File/fiwisikajalaganotibuvodo.pdf
    • http://angelcabrera.com/FCKfiles/file/tinazafulabi.pdf
    • http://akinmedical.com/uploads/file/nizerumalomi.pdf
    • http://10glazsikeyrosa.ru/file/79509593338.pdf
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/dqh8eirqhrukp35br19jaj4f11/25808661701.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/704f912552d5df761a3b49fcfdb0f628/zamoxatumefex.pdf
    • http://alliusie.com/userfiles/file/23642193194.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/61f7b5207a3ceff7387d5042bba7ded9/jexenelafozisusom.pdf
    • http://winfielddeli.com/ckfinder/userfiles/files/53367436341.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e986.bin
c40d60bbd28695ed80879cd58f8dedb156491c46fad13d28a811315485c44ff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 10436 bytes
font_01_sfnt_off00010146.bin
e1483355f1a775e270f6090d19a0cbec3e5fc1c1921d1fbd801113afc14dd059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10146 17288 bytes
font_02_sfnt_off00012e77.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E77 16792 bytes

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