Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ddee97d66ea3b5…

MALICIOUS

PDF

76.6 KB Created: 2021-05-20 00:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 49e2dc95df1c5b9cdda371f351ddd7a8 SHA-1: 4250e50b047023ddec70ad5685e8992a0913e9b7 SHA-256: d2ddee97d66ea3b574862c260dbcf1c853fb9c4e3dae4c3b5e79be55103acb3d
222 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://dafemum.ru/strik?utm_term=maze+runner+3+full+movie+download+in+hindi+300mb', suggesting a phishing or malware distribution attempt. Additionally, the PDF hosts a large number of external links, many pointing to S3 buckets, indicative of a link farm used to obscure malicious activity. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/strik?utm_term=maze+runner+3+full+movie+download+in+hindi+300mb In PDF document text
    • https://static.s123-cdn-static.com/uploads/4501367/normal_6008a26206302.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/ruxuxatin_memixowanob_pidiri_zuwapim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_6022e32e758e8.pdfIn PDF document text
    • https://taregegojife.weebly.com/uploads/1/3/3/9/133997559/8510416.pdfIn PDF document text
    • https://sodipojemip.weebly.com/uploads/1/3/5/3/135325099/9f6506708.pdfIn PDF document text
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/kesisu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473638/normal_5febb23031651.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/nofagipomituretemoliwisi.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/93940479469.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/drawing_software_mac_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/company_analysis_report_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/bnmu_part_3_result_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/free_tetris_for_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/zuxepuvakiwotakesoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/litupeteragotonagubi.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/archer_c7_software.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/icai_exam_date_sheet_nov_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/simesibuwevevidunisaweren.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/maplestory_monster_life_combination_guide.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_off0000ed78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED78 5620 bytes
SHA-256: d99be2a400a93626b7a4822a0c79ead45f3fd39416e7d4a1d4e2bceb9611c6d0
font_01_sfnt_off00010097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10097 10528 bytes
SHA-256: 94d789990953ec84ce7ae4b9fa77858dfbcc82db93e52e27def886b7cbaa09fe

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