Malicious PDF — malware analysis report

Static analysis result for SHA-256 b424600aeae76717…

MALICIOUS

PDF

78.4 KB Created: 2021-03-16 22:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5d24062ddc195dce36163c4f02674f8 SHA-1: ad504559f20b44ec7198b7d9adbcf8bacc04dfad SHA-256: b424600aeae76717390c98c98f66c6467dcab2214dd4b4d024c3486bc0421e96
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that lead to potentially malicious websites, as indicated by the ClamAV detection and ML classifier flagging. The document body, though heavily obfuscated, suggests a lure related to 'relative dating worksheet principles of geology'. The presence of external URIs and the overall detection profile strongly suggest this PDF is used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nipisod.ru/wix?keyword=relative+dating+worksheet+principles+of+geology
    • https://cdn-cms.f-static.net/uploads/4463809/normal_6045c33aa948c.pdf
    • http://jirenaxapibetig.scienceontheweb.net/how_does_the_bulletproof_diet_work.pdf
    • http://xogosedo.iblogger.org/slope_of_a_line_formula.pdf
    • https://static.s123-cdn-static.com/uploads/4369912/normal_5fc81366c8129.pdf
    • https://cdn-cms.f-static.net/uploads/4389599/normal_5fdc6c9da66d6.pdf
    • http://xovitixekewelom.scienceontheweb.net/software_architecture_roles_and_responsibilities.pdf
    • https://cdn-cms.f-static.net/uploads/4388619/normal_6030184936ecf.pdf
    • http://vizilirudigub.getenjoyment.net/42992976338.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_c56e51e267f84835a97c2f62c8f2ba61.pdf?index=true
    • http://pisonepegosa.myartsonline.com/653809760.pdf
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_29e045cfc1d14449aa364ca0cb4f16f9.pdf?index=true
    • http://dasobiviwadodaj.atwebpages.com/ethical_hacking_meaning_in_urdu.pdf
    • http://wifofevowogak.onlinewebshop.net/horus_heresy_siege_of_terra_book_2.pdf
    • http://tasowotata.epizy.com/marginal_costing_questions_and_answers.pdf
    • https://151dec52-cf20-477b-a401-a68195eead79.filesusr.com/ugd/8538f4_8aa69e39e3fe4ca4a22c6e3653fd647b.pdf?index=true
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_325c6b6361634144acb24957f69096f9.pdf?index=true
    • http://mufigodukusa.epizy.com/cooking_leveling_guide_bdo.pdf
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_fb25475278f749b4b115a168ae340997.pdf?index=true
    • http://xijejuvi.myartsonline.com/84042041264.pdf
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_124a4c9bba114dc39942b202612bab4d.pdf?index=true
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_b9314f22b50a40069b879d27038e20ab.pdf?index=true
    • http://bowegasobufur.myartsonline.com/how_to_change_the_battery_in_a_roomba_650.pdf
    • http://nojikigor.myartsonline.com/20336698396.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_off0000f3ee.bin
d61edb8fd1bbc9e21c44f12e0e860c606f535a93b2ed1521faa23f941cecaef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 5744 bytes
font_01_sfnt_off000107a1.bin
d31e2b571cde21a3e27b2013598a56271f7385fb0f99cd1168535207b2aee418		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107A1 10520 bytes

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