Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c4d77bce3808f2…

MALICIOUS

PDF

101.3 KB Created: 2021-04-08 19:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac159f948f6f9fb75d82b0ca4f812cae SHA-1: d7659ad6fab6fd6dd7c1017dd46b6af6a720ea89 SHA-256: 40c4d77bce3808f28d1b3d4f3fbf452937d49597bdbc616f523635a2ec7138ff
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a suspicious domain, likely intended for phishing or downloading further malicious content. The document body, though heavily obfuscated, contains text that appears to be a lure related to a diet crash, aligning with common phishing tactics.

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://pelibifir.ru/strik?utm_term=sirve+la+dieta+crash+del+dr+bolio
    • http://wuxixezigitezir.mygamesonline.org/88994262938.pdf
    • https://cdn.sqhk.co/dadirowuj/CggigoH/7326191671.pdf
    • https://cdn.sqhk.co/gisepavuv/gjgiMhi/66473433976.pdf
    • https://cdn.sqhk.co/boxokozofe/icjbiaS/talking_tom_bubble_shooter_apkpure.pdf
    • https://cdn.sqhk.co/guzufaseba/bz6Xgjh/77865826994.pdf
    • https://cdn.sqhk.co/gusisitixinu/ygficG8/all-_in-_one_solitaire_problems.pdf
    • http://shtancircul.site/kimenegibebgvv3.pdf
    • https://cdn.sqhk.co/kekumumaxow/BhiBvgj/sowiviwe.pdf
    • https://cdn.sqhk.co/pemenixa/Njhsja1/play_lucky_duck_slots.pdf
    • http://alexsaf.ru/advanced_trauma_life_support_algorithmp8y0y.pdf
    • https://cdn.sqhk.co/falugojafat/E2ofidi/super_nintendo_emulator_android_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lofoxos.epizy.com/64911890544.pdf
    • https://s3.amazonaws.com/desekusoxi/35596351543.pdf
    • https://s3.amazonaws.com/vetamedisoz/australia_melbourne_city_video.pdf
    • http://jaxejibowanub.rf.gd/new_york_learner_s_permit_study_guide.pdf
    • http://bitesokilok.epizy.com/mosupiw.pdf
    • https://s3.amazonaws.com/musokejixami/11567948902.pdf
    • http://noxanaviki.rf.gd/bocio_multinodular_eutiroideo.pdf
    • http://nipelijikiki.onlinewebshop.net/apostila_cad_simu_portugues.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_off00014b14.bin
c2513db45bd487f5b877b4e1bac9f999a5bf3470858b2033d6465bbe2b6c771d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B14 5328 bytes
font_01_sfnt_off00015d27.bin
a9b6d483ac0478fd60c072dcba74c4aa5e17ac7a2131ca2c83ef4c1cfcc3a313		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D27 12984 bytes

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