Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e02c4769f54f1f0…

MALICIOUS

PDF

93.9 KB Created: 2021-03-14 12:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3700c63e6fd24a8948fc9dcc19f6963 SHA-1: d2133bacac02fc695d766dba04654e709de481ce SHA-256: 2e02c4769f54f1f0f76d9f1120ee4142c4a9cbb139aa071b0364f752e45cec24
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/strik?utm_term=proscan+plded3273a-c+manual
    • http://pemotutafid.mywebcommunity.org/8420713395.pdf
    • https://pakezumada.weebly.com/uploads/1/3/4/3/134368128/12496c7c.pdf
    • https://cdn.sqhk.co/fejisedetu/dCPggJi/ball_blast_app_store.pdf
    • https://cdn-cms.f-static.net/uploads/4447878/normal_601459cf59e6a.pdf
    • https://cdn.sqhk.co/mekaxosur/igjiaT0/narrator_s_voice_mod_apk_free_download.pdf
    • http://zikewexer.scienceontheweb.net/how_to_find_my_bosch_oven_model_number.pdf
    • https://cdn.sqhk.co/fugovigul/ifjh3ge/red_rose_3d_wallpaper_download.pdf
    • https://kikitepolo.weebly.com/uploads/1/3/4/5/134514310/9616513.pdf
    • https://cdn.sqhk.co/nagotumubo/t1Yhigj/scruffy_dog_cartoon_character.pdf
    • http://kafujaguvo.mygamesonline.org/xufalitevoxasar.pdf
    • http://lojapidabud.mypressonline.com/ahlan_wa_sahlan_textbook_audio.pdf
    • https://cdn.sqhk.co/kixarozikej/jhjadgj/lausanne_2020_hockey_sur_glace.pdf
    • http://jetodubiropev.iblogger.org/all_bumblebee_transformers_toys.pdf
    • https://minizaderi.weebly.com/uploads/1/3/4/3/134344024/f990b4a2ce2ad.pdf
    • https://pulapafux.weebly.com/uploads/1/3/0/8/130874232/cba787.pdf
    • https://cdn-cms.f-static.net/uploads/4426090/normal_60293b2469ef4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nafaradevofipaf.myartsonline.com/amazon_jobs_night_shift_near_me.pdf
    • http://lumosaneja.onlinewebshop.net/39427504240.pdf
    • http://xaxisavubuwowa.epizy.com/oxford_dictionaries_app.pdf
    • http://mipufaz.epizy.com/piloxugixosupameregajela.pdf
    • http://bikutuvuxaxixo.epizy.com/agenda_for_shareholders_meeting_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ff9.bin
e1e51e35559bcd20f68a54a3824bbbb9ef51385b3ef1909b3432e12cb6ff71cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF9 5380 bytes
font_01_sfnt_off00013224.bin
bab823bce8c7924ae6bf2182d499780d56f75e9a033ae6d09f4e61bee09006ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13224 12264 bytes
font_02_sfnt_off00015bb5.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15BB5 4324 bytes

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