Malicious PDF — malware analysis report

Static analysis result for SHA-256 e83a4198247f682f…

MALICIOUS

PDF

77.0 KB Created: 2021-03-14 04:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bba6c6c8177b1818deb29207ee3358d8 SHA-1: 58e3a73810a8400ed7618152eed23c89c2937f33 SHA-256: e83a4198247f682f05e476939da40956edde9a2806828649255b32dd35f29870
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious content, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/123?utm_term=android+phones+unlocked+canada
    • https://cdn.sqhk.co/jifegusewe/fw3jcIy/city_jumper_real_center.pdf
    • http://vas-rem.ru/lower_back_pain_relief_exercisesz0bsn.pdf
    • http://gonifarej.mywebcommunity.org/airbrushing_techniques.pdf
    • http://abanca-electronica.com/subject_verb_agreement_exercises_for_class_11qqd2q.pdf
    • https://cdn.sqhk.co/giganopof/fggicZn/db_train_simulator_online_japan.pdf
    • https://cdn.sqhk.co/rubupidorinu/wibWRjb/5845673022.pdf
    • http://dumubemajizukov.medianewsonline.com/barriers_of_non_verbal_communication.pdf
    • http://itravelgr.com/braun_7865cc_series_7_wet__dry_premium_electric_shaver0taxm.pdf
    • http://douchely.xyz/candy_crush_soda_game_for_android22sh0.pdf
    • https://cdn.sqhk.co/xedogigiloli/jiEichh/nintendo_switch_emulator_roms.pdf
    • https://cdn.sqhk.co/bisidilit/agd6iiW/followers_and_unfollowers_app_safe.pdf
    • http://getyourcredit.info/11368023136a8fu.pdf
    • http://lizuzezusad.medianewsonline.com/bse_odisha_class_9_books.pdf
    • http://optarfes.com/gateway_ne56r41u_biosebohz.pdf
    • http://persequenteamsohbet.com/89343118650bp4zw.pdf
    • http://love-cosmetics.shop/english_to_spanish_audio_translation_app_for_androido4k54.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gegilifopom.myartsonline.com/is_effie_trinket_in_the_mockingjay_book.pdf
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_691d955d6c164027bbd8a4db44a5c15a.pdf?index=true
    • https://s3.amazonaws.com/jenagubadopi/bawolubonixixo.pdf
    • https://s3.amazonaws.com/zosevid/abhinetri_2_movie_tamilrockers.pdf
    • http://gupizamowakop.myartsonline.com/56988052956.pdf
    • https://s3.amazonaws.com/fuzafuzeruwit/how_to_get_tree_logs_animal_crossing.pdf
    • https://s3.amazonaws.com/pegek/qantas_frequent_flyer_membership_application_form.pdf
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_c05738d3a8f84577a40a7f4a13c1907a.pdf?index=true
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_3611d7d260de4b82ad8bfb9cc21b704f.pdf?index=true
    • 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_off0000eeb9.bin
3fbdca9c7c331f3db214fd6c4de5d0298fbf0a9c8a4e2cf322c1d252e6641fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB9 5212 bytes
font_01_sfnt_off0001006c.bin
582b6bf47083280a30d06ddfa5abc253fc058acc87c672eb266267c6d73e5a19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1006C 11136 bytes

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