Malicious PDF — malware analysis report

Static analysis result for SHA-256 4345506418a9524a…

MALICIOUS

PDF

67.9 KB Created: 2020-12-22 01:12:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6863de6e078b94267a913111f43cb754 SHA-1: 51b83691a8525d5cd2643f3465df6269e9316053 SHA-256: 4345506418a9524a3361bab1e9cc1d5368db5f3451831972d5933cb5c4e40182
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to benign content, but one primary malicious URL is present. The heuristic 'PDF_SEO_LINK_FARM' indicates a technique to disguise malicious links within a large set of seemingly legitimate ones. ClamAV and ML classifiers confirm the malicious nature, identifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://traffset.ru/strik?utm_term=train+your+mind+quotes PDF link annotation
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/fc74d9089574.pdfIn PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/vitadusuw-sexuk-maximabili.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479445/normal_5fc96b02e9755.pdfIn PDF document text
    • https://rinumobepora.weebly.com/uploads/1/3/4/3/134377952/7decee025a.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/1246403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f92399c664bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdebfeb2dcd53187f206807/t/5fdf0fb5a478394ebcaf9f42/1608454069662/steam_slows_down_at_end.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0da75085bf90c0efcd65a/t/5fd1ef22b91f50015ef1041e/1607593764954/modern_application_of_air_power.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7ae2af9cd615d7ca950fa/t/5fd6fcc6102ca46975f97228/1607924934748/free_printable_irregular_plural_nouns_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe11ca3e3ba044ee8dffad7/t/5fe123485ee0bd60dca08910/1608590153426/runusazapofisaximag.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe17922dd96f5918b68023/1606293395088/talk_talk_discography_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a9a317-af08-4bb8-854d-3db3594e5377/videoshop_pro_apk_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf3d6bdeaf7179bbd0a4c7/t/5fd07e38281783041123f17d/1607499321013/pendidikan_di_era_society_5._0.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b611abffab30daade22d/t/5fcfdfad4b348f0c1afd0688/1607458735606/best_instagram_hashtags_for_likes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfecf3485235c868ba150/1606287066770/17528272183.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe01cda97599144ebe16f0/1606287822241/bokizesifazulofafiwobumiz.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE10 5116 bytes
SHA-256: a7117c23de78161529682e46bf1ddb76c689589e2e6c3a9ff86204d246ad01de
font_01_sfnt_off0000df62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF62 10420 bytes
SHA-256: 16d9cdd5da8c028f7b9864618814919280ec84b53ad297cae03158f42f5ffd16

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