Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2127cc49c3085ca…

MALICIOUS

PDF

87.2 KB Created: 2021-02-21 03:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dfd81ce3ebbd042d63e2b385bcfb5a9 SHA-1: 39f1ef35160a837bbd049a58d507e57ba368f08a SHA-256: a2127cc49c3085ca76b891fe8538839953be470285cea658b0398bf03c7db445
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=episode+choose+your+story+free+gems+cheat'. This indicates the document's primary purpose is to redirect users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/wix?keyword=episode+choose+your+story+free+gems+cheat
    • http://rezonansmusic.com/17231742903fhixl.pdf
    • http://trenketo.buzz/blue_book_equivalent_for_rvsyt8yu.pdf
    • https://cdn-cms.f-static.net/uploads/4458394/normal_5fe84d913a622.pdf
    • http://gallery-shop.site/netgear_n600_model_c3700_specsdr8z8.pdf
    • https://tirugisig.weebly.com/uploads/1/3/0/7/130738706/f1781.pdf
    • https://cdn-cms.f-static.net/uploads/4417208/normal_600dce37ec67d.pdf
    • http://rollernefritmassage.xyz/85166068917k99ii.pdf
    • http://1-bog.ru/2556092548467zod.pdf
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/8160969.pdf
    • http://free-at.pro/vidoxaxisilubibulirla2u.pdf
    • http://presentinsta.site/12122447182yief3.pdf
    • https://cdn-cms.f-static.net/uploads/4456116/normal_5fdc1181d0bb7.pdf
    • https://cdn-cms.f-static.net/uploads/4480905/normal_60167030e2e09.pdf
    • http://oneitshop.info/33392958098kae5i.pdf
    • http://stixlife.info/neverwinter_oathbound_paladin_build_mod_16scef5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vuzotisenixava/kedamixokitoxepelojo.pdf
    • https://s3.amazonaws.com/megujobemegor/xekusilawal.pdf
    • https://s3.amazonaws.com/wupagivoz/improving_vocabulary_skills_answer_key_chapter_3.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f74d.bin
79a4d432d220d756b9deed1dc02be4957ad35d3957a32011bd6fb1a69f53979d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF74D 5596 bytes
font_01_sfnt_off00010a2d.bin
eda7d0e98a52ecbf69b78341daa57c43cafe4f8371fd69a4ec3f10deeca2fac1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2D 4096 bytes
font_02_sfnt_off000114c2.bin
28ef9882dc104de9ca5a896b6672ceafcf77447ddc04a71ede058ff30e357c56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114C2 10664 bytes
font_03_sfnt_off0001397b.bin
4862f0796d5cbf2b429715f2b47f15d06f0c641f927a022d27f217f4f39910ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1397B 16080 bytes

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