Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed118affb2b4e31d…

MALICIOUS

PDF

68.6 KB Created: 2021-09-26 00:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 54f7b1f54b8cb5d569bb56396ae3bd1f SHA-1: 48be63294139c49e61c4b5e6def2c3a4339f6187 SHA-256: ed118affb2b4e31d50344b55b0e25ad34c10356fd2b4da0f4035591aa0560ff8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URLs, many of which are associated with link farms and disposable hosting, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the exploitation of PDF vulnerabilities or the use of embedded JavaScript to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://oniceh.ru/uplcv?utm_term=blastup+instagram+followers PDF link annotation
    • http://www.samuitns.com/image/upload/File/62825264812.pdfIn PDF document text
    • https://vinasimex.com/uploads/file/88176783367.pdfIn PDF document text
    • http://chongthamphucthang.com/images/news/files/nabedabo.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/kawewizas.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/govolazigomu.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/50209123034.pdfIn PDF document text
    • http://brenderup.ro/mm/file/96686344540.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/guwokujorunixoz.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/66812298589.pdfIn PDF document text
    • https://trongtrucsolution.com/uploads/files/dewumezokevaf.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ce8f45238f---pafafozopilixoxodej.pdfIn PDF document text
    • http://czyxchem.com/upload/files/fodava.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/d1a825848532151c8ad7f83d0a828f51/15964675357.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/jojigufaradov.pdfIn PDF document text
    • http://fsanaq.com/upload/file/2109120156098828777275y6wgctew.pdfIn PDF document text
    • https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/77882062943.pdfIn PDF document text
    • http://jszl-rolls.com/filespath/files/20210921102613.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/67324550711.pdfIn PDF document text
    • http://instalace-charvat.cz/userfiles/file/6999691156.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_off0000a976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA976 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18D 10940 bytes
SHA-256: 5be2e1538f230bf68db14f10e8aaef1c993c905595868ddecb59ecf7a35597ff
font_02_sfnt_off0000dafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFD 16340 bytes
SHA-256: 41a785c90d641ceda5b61b762a1fd5aea30a1fcf24d42b104f281a76a89856cb

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