Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75b4a51c4df2d64…

MALICIOUS

PDF

77.8 KB Created: 2021-04-01 09:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc2bd1a31ca15643d42c10ac3acbaf75 SHA-1: 68f95e5b40add39a7babda5d847eb015e1f886c7 SHA-256: e75b4a51c4df2d6419c1325b97f33ffd337890d85480c62a12502befd1b17a0b
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 point to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=elk+m1+erp+software
    • http://nugowimabu.mywebcommunity.org/anthem_for_doomed_youth_questions.pdf
    • https://gifofelonapa.weebly.com/uploads/1/3/0/7/130775883/vonilopalumejidowe.pdf
    • http://jexekiraj.sportsontheweb.net/autodesk_design_review_convert_dwg_to.pdf
    • https://cdn.sqhk.co/jojojidatun/xqgegff/army_draw_form.pdf
    • https://cdn.sqhk.co/forexidof/5nbtgig/doomsday_preppers_food_list.pdf
    • http://zutatowatipo.mywebcommunity.org/xosewolivugituxeka.pdf
    • https://cdn.sqhk.co/bisuligiga/cjfuhjM/vusavenuleduvimom.pdf
    • https://rolugoxeve.weebly.com/uploads/1/3/1/3/131380951/lelebo.pdf
    • http://ninomut.sportsontheweb.net/why_does_my_lg_tv_screen_keep_flashing.pdf
    • https://cdn.sqhk.co/bosejadukifo/E5hjaLL/floating_underwater_car_free_mod_apk.pdf
    • https://cdn.sqhk.co/vimewiki/gih62KN/mumanelinaxilum.pdf
    • http://dogalijun.scienceontheweb.net/best_arm_workout.pdf
    • http://gekodejevotug.medianewsonline.com/67311640184.pdf
    • https://cdn.sqhk.co/luwesefizi/2NhgKw4/zoxoxudidivilikozotapona.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/loneminovu/vocaloid_editor_free.pdf
    • https://s3.amazonaws.com/wazorixekunafob/whatsapp_for_nokia_206_latest_version.pdf
    • https://s3.amazonaws.com/wivunonovef/global_community_definition_in_sociology.pdf
    • https://s3.amazonaws.com/bidemewufa/cartoon_network_live_tv_apk.pdf
    • https://s3.amazonaws.com/wexoteluwag/mogenedanirevame.pdf
    • http://sekuwomexapa.myartsonline.com/gumerabirepalixamaxuwonig.pdf
    • http://vesedakowata.onlinewebshop.net/abituriyent_jurnali_2_2020.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_off0000e72d.bin
e7e816ffe5eb98156fc53afb352b757b393edfcbae4fc963e1dff0e934057327		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE72D 4848 bytes
font_01_sfnt_off0000f7b7.bin
9b58fa6052ec13581df0f54fda2812f2c5d2979a8e27750321c2de297d35a38f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B7 10716 bytes
font_02_sfnt_off00011c28.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C28 4324 bytes

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