Malicious PDF — malware analysis report

Static analysis result for SHA-256 283b486e9fc7a262…

MALICIOUS

PDF

80.9 KB Created: 2021-09-13 17:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6ed1541ad46605e7085aa71e844d74f2 SHA-1: 12807d922211d6c21e09e28cc449fb72e26c4b44 SHA-256: 283b486e9fc7a2625de3c970890f9eb84dad6a5efddf2785fb23feec6abef1b5
126 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 numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content are consistent with techniques used to lure users to malicious sites.

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 https://medvor.ru/uplcv?utm_term=words+beginning+with+y+to+describe+someone PDF link annotation
    • https://office-agglo-larochelle.fr/userfiles/file/tedilidizat.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/gutakazub.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbf0422f23---79016298447.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/pesonuluj.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/xolotokaxomebimapizodom.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-9-11/20210911043834957886.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/760026893.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/xegejewimarevada.pdfIn PDF document text
    • http://udaybharat.in/ckfinder/userfiles/files/45056875764.pdfIn PDF document text
    • https://dcicz.org/userfiles/file/33791283163.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/gijinuluxotovi.pdfIn PDF document text
    • https://orrizon.ru/images/file/25875705054.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/xakafi.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300b40dd4ce---21900707684.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/wenura.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xazabiwebulefe.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210903_071711.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/23112842093.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/lademonidogowe.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/nesewasaje.pdfIn PDF document text
    • https://frisch.ro/files/file/17812119130.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/79292154209.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/2756037938.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_off0000d6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 17876 bytes
SHA-256: 2a71e73f7dacc2218ef093f63bbfc170809c907c8366aaa7f4c0d2cab4ddac78
font_02_sfnt_off00011cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD1 10944 bytes
SHA-256: 876dcb5177eda5511ac8f27415f0f05550b928892ba1ecdd0723e3cc05fb75fd

Open this report in the interactive analyzer, or submit your own file for analysis.