Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1c6a40dc782b05…

MALICIOUS

PDF

89.0 KB Created: 2021-05-21 11:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9ff91d94d2bbc763deb8128a3a87778 SHA-1: e667f85a7d7a3a7f686f33ccede3ecb153be767e SHA-256: 2b1c6a40dc782b052e61d5852e4ee0ae8269faee431f316bf97f7e9d02c419db
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The embedded URL and document body suggest a phishing lure related to a free download, likely leading to the execution of further malicious content. No scripts were extracted, but the PDF structure and external URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=trials+of+apollo+2+pdf+free+download
    • https://jafusakivamo.weebly.com/uploads/1/3/0/7/130739280/wanaj_xigidapixozop.pdf
    • https://pudebotajiv.weebly.com/uploads/1/3/4/0/134012430/koxik.pdf
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/kosofawadava.pdf
    • https://mokapojigum.weebly.com/uploads/1/3/4/6/134690111/303412.pdf
    • https://static.s123-cdn-static.com/uploads/4407562/normal_5ff45490b9aa9.pdf
    • https://static.s123-cdn-static.com/uploads/4474752/normal_5feb749b9040c.pdf
    • https://vakogupomuniv.weebly.com/uploads/1/3/4/6/134610568/3ecfe9a204faa.pdf
    • https://cdn-cms.f-static.net/uploads/4495264/normal_60591f95adc6e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/viboxikuz/bizokoto.pdf
    • https://s3.amazonaws.com/vuzotisenixava/dog_fursona_template.pdf
    • https://uploads.strikinglycdn.com/files/96992c91-64d6-4eda-a49a-f751383ecfb4/how_to_reset_a_verizon_mifi.pdf
    • https://s3.amazonaws.com/pusori/is_romeo_and_juliet_a_love_story_or_tragedy.pdf
    • https://s3.amazonaws.com/jepavilutabilel/nofifek.pdf
    • https://uploads.strikinglycdn.com/files/3f6cb162-788b-4a15-a671-3a9b7ac537a2/fivuxamepefov.pdf
    • https://uploads.strikinglycdn.com/files/6fa3571f-6c15-4158-aeee-36e556071d10/how_to_find_one_interior_angle_in_a_polygon.pdf
    • https://uploads.strikinglycdn.com/files/9f30269e-d0ae-4d87-ad45-89ed3d10a889/nespresso_aeroccino_milk_frother_reviews.pdf
    • https://s3.amazonaws.com/kitakilesa/vitamix_blender_parts_canada.pdf
    • https://s3.amazonaws.com/remuv/21909512914.pdf
    • https://uploads.strikinglycdn.com/files/71c06bda-ad04-45c2-bbef-2b9bb76a9fac/betajoxuxidanud.pdf
    • https://s3.amazonaws.com/somisilegex/45389801458.pdf
    • https://uploads.strikinglycdn.com/files/1b2c1439-0fe0-4aed-8d4b-44c1a2ac05c8/zesifetimibajobarajijer.pdf
    • https://uploads.strikinglycdn.com/files/0e14a586-08ce-499b-b392-c53c544cdc45/79987721270.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118f8.bin
5ffbf60ecce66bf8c15c933267b607d7d63be1995d15cc26f0ff78f84aaa3b40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118F8 5208 bytes
font_01_sfnt_off00012acf.bin
592730710dc97a1719d2b42927328f1db3b23eda23a9fa9b4a67d5f4f47fa491		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACF 13492 bytes

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