Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98047bd9619a61b…

MALICIOUS

PDF

71.8 KB Created: 2020-12-22 19:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 195a331b4feb3c384db0ce440484bafb SHA-1: 14a5855328ec60c1f41ff61c38a383ba2f9891fa SHA-256: b98047bd9619a61b89f9d5debce60d689343ad68ce69d779ec8517d333d21bc1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, specifically identified as a phishing trojan. It contains numerous external links, with one prominent URL leading to 'traffking.ru', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to data transfer, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/strik?utm_term=data+smart+switch+samsung+to+iphone
    • https://fagozeku.weebly.com/uploads/1/3/4/5/134506452/bupadoso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/77d78330-4df3-4722-901a-dc8a34ccc42c/reflections_springfield_il.pdf
    • https://uploads.strikinglycdn.com/files/aecff1b4-9676-427b-8327-d10056957480/52841231105.pdf
    • https://uploads.strikinglycdn.com/files/dbf538d1-94c9-4f66-99a6-5e4319851db2/fuzemugunaxalolukogebuxe.pdf
    • https://s3.amazonaws.com/gezetega/journal_of_applied_microbiology_author_guidelines.pdf
    • https://s3.amazonaws.com/bogeguva/95079932669.pdf
    • https://s3.amazonaws.com/netinuwa/mousehunt_map_solver.pdf
    • https://uploads.strikinglycdn.com/files/eddfee43-2067-4a46-8903-e947e454c610/tutapojuwewogidibibusu.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf65663485235c86be5ffb/1606378856653/27604750969.pdf
    • https://static1.squarespace.com/static/5fdcb8151ac7e22a65153ef0/t/5fdcf8a663b3fc57bde8ddaa/1608317095633/donelle_collection_sheets.pdf
    • https://s3.amazonaws.com/garorowa/un_lugar_en_silencio_2.pdf
    • https://static1.squarespace.com/static/5fc0c991c6d9645836219624/t/5fc128754e98326c0239bb52/1606494325259/gexadotabun.pdf
    • https://s3.amazonaws.com/rotowan/peoplesoft_9.2_installation_guide.pdf
    • https://uploads.strikinglycdn.com/files/dae0071e-ebcb-4c16-904e-f52e852855e7/81143303829.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce1e.bin
45b6489e684fc02789658762b2f6af2af859e8556da6044489efb5b9db4362d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1E 4048 bytes
font_01_sfnt_off0000dc80.bin
2a13b6e13ca4776f4866e16a3302f09bc3d9e23ca34aca8738862bbf8d3ce526		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC80 5404 bytes
font_02_sfnt_off0000eed5.bin
2976ef9c4325e94057a411f71b84adc931d18c7fdb055246d7d0eac2f186890c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEED5 10276 bytes

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