Malicious PDF — malware analysis report

Static analysis result for SHA-256 24bcf07261a44adc…

MALICIOUS

PDF

86.8 KB Created: 2021-09-16 17:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e622c42116f8a81c75cb603195e26027 SHA-1: df645eec3865a26a9c58cc0b23cfae5629bdda60 SHA-256: 24bcf07261a44adce849a9216a0dca5059db1f544e63d884b055ca8cdeba1785
146 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. Heuristics identified multiple external URIs and a link farm on disposable hosting, suggesting a phishing or malware distribution lure. 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 0.9980

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://vidaleve.net/ckfinder/userfiles/files/49813115972.pdf In PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfcd466946---wokipifapebaxasixuw.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/barimidagomuzinobirug.pdfPDF link annotation
    • https://jechrina.gr/FCKeditor/userimages/file/73377426453.pdfIn PDF document text
    • http://szm.hu/userfiles/file/kiripi.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d0b5c25bca1304ffee2a7dd5ba532e00/simagekebo.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/85151108418.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/tufirolovulube.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/ganewodototubasutid.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/jitavofupabugimozawiwiren.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/47420711721.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/jatapobolavemukufe.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/bepazijulot.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/40733926249.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/zedarezosefoxegenurod.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/25262833659.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/pizixusezemupifam.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/26003379044.pdfIn PDF document text
    • https://tutorlookup.com/ckeditor/ckfinder/userfiles/files/78805171811.pdfIn PDF document text
    • https://stormester.no/files/file/22438705163.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/58862047709.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/64201394939.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=jung%27s+map+of+the+soul+pdf+downloadPDF 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_off0000eaaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAF 19144 bytes
SHA-256: 1bc78fed983de4ea344b790ef35529807359e3b40a7b7eaa1304f574402be39d
font_01_sfnt_off00011bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E6 10964 bytes
SHA-256: 5918508d5da7a39ee73cff7a8e178e8a66d21c9c821433fd4bdba8dde476d20e

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