Malicious PDF — malware analysis report

Static analysis result for SHA-256 002bd35cdcf0cda3…

MALICIOUS

PDF

74.2 KB Created: 2021-03-22 10:37:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fa596d436f0f1c6efed6db6273ff51c SHA-1: 5c7f92ad3965a4fbc237465212ff9eecae586139 SHA-256: 002bd35cdcf0cda345bf59376c35327c3a9b958c29ab85f1892e33c425ee9b74
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which are associated with unknown or potentially malicious domains, suggesting a lure to download further malicious content. The document body, though heavily obfuscated, references '3rd grade multiplication and division worksheets pdf', indicating a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=3rd+grade+multiplication+and+division+worksheets+pdf
    • http://tamasolesodaj.mypressonline.com/raci_matrix_project_management.pdf
    • http://tosety.xyz/mastering_chemistry_pearson_answers_chapter_8lbsrx.pdf
    • https://cdn.sqhk.co/teposodigar/wjagjhi/color_by_number_apple_pencil.pdf
    • https://sozatugija.weebly.com/uploads/1/3/4/8/134859818/2862492.pdf
    • http://hookup154.online/rilijun0ewwp.pdf
    • https://static.s123-cdn-static.com/uploads/4374860/normal_5feba129a6801.pdf
    • https://cdn.sqhk.co/lodikorep/fyhhejb/bingo_blitz_bingo_games.pdf
    • https://kebafilononuxo.weebly.com/uploads/1/3/1/3/131378837/lenisojom_sevopipobarimuf.pdf
    • https://dedemapisiwopiv.weebly.com/uploads/1/3/0/7/130775251/b588e59d6a0b5b0.pdf
    • https://nikamajavefuxo.weebly.com/uploads/1/3/1/0/131069808/7c4c1e9a3b33e9.pdf
    • https://static.s123-cdn-static.com/uploads/4391314/normal_5fc88151f3237.pdf
    • https://lujututuvaribo.weebly.com/uploads/1/3/4/3/134339905/4432db85b3.pdf
    • http://kneeksi.ru/jivuvowebuqu0n3.pdf
    • https://cdn-cms.f-static.net/uploads/4426679/normal_6037dacd25221.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dotivaf/95112258328.pdf
    • https://s3.amazonaws.com/kiremefegonar/84417280086.pdf
    • https://s3.amazonaws.com/faxaxos/interoception_the_eighth_sensory_system.pdf
    • https://s3.amazonaws.com/bogijexu/blood_groups_genetics_worksheet.pdf
    • http://supuwevul.atwebpages.com/kunigadenadikokulase.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_off0000e134.bin
055a299c9dd723765102d641b8b2d1f586e24e8d3e6f07ff54ce2b9650d034ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xE134 5856 bytes
font_01_sfnt_off0000f50d.bin
7d6f1cb29292ec94ba83530dbaebb19d084bba8b958908930fd11eb8ae487d7a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF50D 10544 bytes