Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb186b69d8755e6…

MALICIOUS

PDF

79.6 KB Created: 2021-05-14 09:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e659758021505d473d26d7dbd5281a1 SHA-1: 234e66c23f114361281a95628cf38bb5e590c549 SHA-256: 3cb186b69d8755e6b3a3f873725a1795fd710af7a1dd2887910c728aa9dce80e
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating the presence of external URIs and is flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded document body, though heavily obfuscated, contains text related to text message symbols, likely serving as a lure to encourage users to click the identified malicious URL. No scripts were extracted, but the overall structure and detection signatures point to a phishing attempt designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=what+does+the+symbol+mean+in+texting
    • https://cdn-cms.f-static.net/uploads/4482870/normal_6022f19503aa9.pdf
    • https://cdn-cms.f-static.net/uploads/4464865/normal_601fc4d6bada5.pdf
    • https://mufudoxideli.weebly.com/uploads/1/3/4/5/134508761/16c3610f699e65d.pdf
    • http://nogurufegu.mygamesonline.org/guangzhou_metro_map_2020.pdf
    • http://ruwosiju.getenjoyment.net/92200273502.pdf
    • https://cdn.sqhk.co/zuxedanafowa/zjfX4jb/knife_dash_mod_apk_revdl.pdf
    • https://cdn-cms.f-static.net/uploads/4421354/normal_6045fb71653f2.pdf
    • https://cdn.sqhk.co/mikevoponage/5ZMEebi/catfished_slang_term.pdf
    • https://furedanoduribi.weebly.com/uploads/1/3/4/6/134681858/2969332.pdf
    • https://cdn-cms.f-static.net/uploads/4457311/normal_5fe84f053c5c7.pdf
    • https://zoseduzarososu.weebly.com/uploads/1/3/2/7/132740870/rupem.pdf
    • https://cdn.sqhk.co/tivinarafuvu/7oif3hf/my_block_tupac_chorus.pdf
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/44886.pdf
    • https://govewusig.weebly.com/uploads/1/3/0/9/130969429/5347220.pdf
    • https://cdn-cms.f-static.net/uploads/4420592/normal_605d3896b4dff.pdf
    • https://cdn.sqhk.co/vavetiset/MJibkk8/flutter_ecommerce_app_template.pdf
    • http://delozofize.scienceontheweb.net/nutribullet_rx_blender_and_food_processor_1.27_l_1700_w_energy_class_a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xunilukegez/zilugunakoluzoj.pdf
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_24c74c3bb5414569bbcd7053e1f56f7a.pdf?index=true
    • https://s3.amazonaws.com/jeduzizonox/rt_n66u_aimesh.pdf
    • https://s3.amazonaws.com/fusidejebi/bounded_sequence.pdf
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_a1090881f0d64cef8e8c8b01844d3b21.pdf?index=true
    • https://s3.amazonaws.com/pajukovuxetu/ponelomulofutegilab.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_off0000f8f2.bin
c4ea01ee9ec7889c4f9f60bcadd8b30f9761e9e8ee4e433e5fd051db9383f21c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F2 5468 bytes
font_01_sfnt_off00010b7a.bin
3eff77814f087bfcfce15a3c328e2649d6e603af500e7174b286f7df4970c575		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7A 11012 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.