Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8155273dfdade22…

MALICIOUS

PDF

73.6 KB Created: 2021-03-21 01:14:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dae9337aff6b4f21e17373f4fbce373d SHA-1: 4ef724d01120433e1ff106615e60fd7d8ef69768 SHA-256: f8155273dfdade2288db5a9a306d881fe4249f827f7dfc5082973f39b2632389
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 high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, contains keywords related to appliance error codes, suggesting a lure to trick users into clicking the malicious link.

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://midufefew.ru/strik?utm_term=maytag+neptune+washer+error+codes
    • http://899themes-demo.ru/kitchenaid_mixer_ice_cream_maker_manualyseux.pdf
    • https://cdn-cms.f-static.net/uploads/4470977/normal_5fda88f29f998.pdf
    • http://study-english-04.space/its_a_boy_girl_thing_full_movieyosad.pdf
    • https://cdn-cms.f-static.net/uploads/4414166/normal_601217623d368.pdf
    • http://milktree.store/danetugajolipikubiia7os.pdf
    • http://ultra0.space/divitusozidagojav7lix.pdf
    • https://sepuzudagek.weebly.com/uploads/1/3/5/3/135329554/kepeveji-wopuwagin-zetuniz.pdf
    • http://fabulouss.space/dikufuews9f.pdf
    • http://seomagnat1.online/5314458371usb7m.pdf
    • http://springwin.space/vewisabexokelowokugunuredn3313.pdf
    • http://static-get.top/python_2._7_exe_for_windows_10wryz9.pdf
    • http://ruwazumusef.scienceontheweb.net/13276052746.pdf
    • http://sadovik.me/diet_meal_plan_for_a_week_philippinesbq5jm.pdf
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/ludabefar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_41374f584c85415699df80fef3044aab.pdf?index=true
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_fa64412c99ed42629aebc7572f5ba079.pdf?index=true
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_87179cedbc4541c2a2c12503ea1b0043.pdf?index=true
    • http://solugivewatewa.myartsonline.com/damubuge.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_off0000e2e5.bin
bf4fec1766e1db752ea1ee19fce86492cdc1dfcb82e66dc98e8c42883b2bf57f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E5 5504 bytes
font_01_sfnt_off0000f5ba.bin
1f9f4882ba92c1eb9d1ec0e1b6560170ce87d084ef3bc8b0871a617d80eff531
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BA 10300 bytes