Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b2b35790b9ea67…

MALICIOUS

PDF

78.0 KB Created: 2021-09-09 22:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5051cf760e266dc5d6ac6c41248a166e SHA-1: d122edc67e1ff41102bc726bd8f0c07aac2912d7 SHA-256: 44b2b35790b9ea673bd3dcd591c9b1e7d0136693a34674bbb9da9514ac1dd7c3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, suggests a link farm or phishing campaign designed to redirect users. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely a phishing lure or a downloader for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://woodlandhills.ilovepokebar.com/uploads/files/55545871529.pdf In PDF document text
    • https://movingalpsfoundation.ch/userfiles/file/dumutijodegobo.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/xavasawuxavulazoziwuxobam.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/63785113113.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/97854826257.pdfIn PDF document text
    • http://0286869143.com/editor_images/files/bediwigixatorivod.pdfIn PDF document text
    • https://dampinggame.com/calisma2/files/uploads/tinudipopatifiwaju.pdfIn PDF document text
    • http://humanlitech.com/files/files/69914807514.pdfIn PDF document text
    • http://hidropro.hu/upload/leduxip.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/57889397963.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/lejezanevelafo.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/5515aca26f66c718730029ba9c3e7938/nudazesolojumawaju.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/44385312073.pdfIn PDF document text
    • http://www.hkimm.hk/_bin/ckfinder/userfiles/files/lakovisan.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/rafimewuwojinifapap.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb9610bd04---10826433282.pdfIn PDF document text
    • https://ginecologmuresan.ro/ckfinder/userfiles/files/55999544648.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/56240035623.pdfIn PDF document text
    • http://vector-food.com/userfiles/file/newituzugufegalupizoduvin.pdfIn PDF document text
    • http://unibox.lv/files/text/94105898748.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/71015271381.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=get+cp+call+of+duty+mobilePDF 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_off0000ca33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA33 10800 bytes
SHA-256: 2741276c15d6b059ae12dafd597293ae2286be8945e5000347e219ed3b4c83c7
font_01_sfnt_off0000e2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 18392 bytes
SHA-256: 7ba0318a1f6eaf3d18b0f21c7c6acacdf3cc7551c502a64353b039b167504ff9

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