Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35054560fefbf52…

MALICIOUS

PDF

78.5 KB Created: 2021-04-23 03:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28c26aa3d1d451db4bfd0bfa31eb9469 SHA-1: 292fd5b3994ef941a80f1ab4ac6fcb0a175b3234 SHA-256: d35054560fefbf527b2d884c538ebeac73e7b658aa34bd7fde64c41512a33d2d
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains an embedded URI pointing to 'nipisod.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to connecting audio equipment to a TV, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=how+to+connect+rca+sound+bar+to+tv
    • https://cdn.sqhk.co/sunaxidida/zmhfoPO/city_racing_lite_hack_mod_apk.pdf
    • https://wimekigulaz.weebly.com/uploads/1/3/1/1/131163744/nofotezife.pdf
    • http://larts.digital/ridurre_filegynjf.pdf
    • http://expressday.online/anatomy_of_monocot_stemt46rq.pdf
    • https://cdn.sqhk.co/xuwolupenilu/jfhgLjd/five_ten_freerider_pro_tld_mountain_bike_shoes.pdf
    • https://cdn.sqhk.co/dizukenepu/fggjftT/how_u_say_hi_in_japanese.pdf
    • http://pe50off.info/dialectical_behavior_therapy_dbt_combines_cognitive-behavioral_therapy_and9k8oc.pdf
    • https://cdn.sqhk.co/pawapoma/FigherM/pigijirapakadukozapewefig.pdf
    • https://fugakesuj.weebly.com/uploads/1/3/0/7/130776648/bewovub.pdf
    • http://sedouche.xyz/bravos_xl_washer_code_lfgcrl9.pdf
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/4236480.pdf
    • https://binazinir.weebly.com/uploads/1/3/4/1/134108718/670843ec3f2.pdf
    • http://heartcenteredequestrian.com/36084612247lwk8i.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tezude/vuvuzuleziwebadusepegit.pdf
    • https://uploads.strikinglycdn.com/files/409832c9-a266-4a6c-8965-dd6d94cac4b4/what_size_windshield_wipers_for_2013_ford_focus.pdf
    • http://vejidot.epizy.com/hunger_games_catching_fire_finnick_death_scene.pdf
    • https://s3.amazonaws.com/kavugusepe/32237688783.pdf
    • https://s3.amazonaws.com/gafedupeba/how_to_make_questions_in_english_exercises.pdf
    • https://s3.amazonaws.com/rizezobabub/97388041185.pdf
    • https://s3.amazonaws.com/sajezife/cps_online_report_tamilnadu.pdf
    • https://uploads.strikinglycdn.com/files/8d677fa9-ae38-40b0-9757-e499b20946db/wendys_breakfast_burrito_nutrition_information.pdf
    • http://beritoka.rf.gd/acknowledgment_of_paternity_form_dss_4418.pdf
    • https://uploads.strikinglycdn.com/files/aecbcbf0-01ca-4942-8c18-d501f3a55d81/5_dysfunctions_of_a_team_synopsis.pdf
    • http://pariwexeral.epizy.com/receivable_aging_report_excel.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_off0000f6cf.bin
4348a518624f3f9833433ff2a56811fec5484a70fc2636bad387f449129e2898		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CF 5156 bytes
font_01_sfnt_off00010874.bin
ab3a805608344edc7b453477d79e23f1f7adae92134f2321625c929213074d7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10874 10532 bytes

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