Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e7ac62b8cca8bc…

MALICIOUS

PDF

84.1 KB Created: 2021-03-27 22:16:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca0621b4a687293d97bd0b0fbb044d69 SHA-1: 17f5815371ce05c43311848fea90f0c68f5cd407 SHA-256: e1e7ac62b8cca8bc7481391261a281abf4b3a4eb47e93e45f9e5257d72e5029e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of links, suggesting a malicious intent to redirect users. ClamAV detection and ML classification further support its malicious nature. Although no scripts were explicitly extracted, the presence of external links implies an attempt to download or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/award?keyword=neumonia+necrotizante+pediatria+pdf
    • https://cdn.sqhk.co/gixotagokezu/hdnijKT/the_biggest_little_farm_movie_wikipedia.pdf
    • http://runmasten.online/pasozagamalufodexixezewbo4q.pdf
    • https://cdn.sqhk.co/suxepemup/Mrcjigc/walesi_application_form.pdf
    • http://skout.tech/ms_excel_practical_exercises_with_solutionsjsgif.pdf
    • https://cdn.sqhk.co/gotuxixovumu/gj0jcja/dungeon_fighter_online_characters.pdf
    • http://goromeo.club/rowugevadegof2lcaj.pdf
    • http://copyright-infringement.business/best_engine_oil_for_toyota_corolla_2009w2np9.pdf
    • https://cdn.sqhk.co/temirikuji/igToIUL/jajelirosot.pdf
    • http://lnstagram-verifedbadge.com/how_to_learn_algebra_1_and_2_fastim9kk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fafe4492-4190-4a63-8b94-2382b7242b9a/how_to_program_a_samsung_washing_machine.pdf
    • https://uploads.strikinglycdn.com/files/8ba07f6a-7b21-4685-ba8f-36b16e153d7a/28196583528.pdf
    • https://uploads.strikinglycdn.com/files/47c3aa42-b150-40d0-8a0a-80f00eca4ce6/fozupanadodepasanemudi.pdf
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_3751254185ad4175928caa6321e889c0.pdf?index=true
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_bd4f01badfb54122abe647cc3215631d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eda71b02-b948-4d58-9c96-80b07682c542/best_chest_resistance_band_exercises.pdf
    • https://uploads.strikinglycdn.com/files/afc6f1e0-76a3-4f9b-bfa1-6ef8eedbcb48/echo_pb_250_carburetor_rebuild_kit.pdf
    • https://uploads.strikinglycdn.com/files/22a99f62-d3f2-4cf1-9a31-fcecbe4d4aa8/full_form_dictionary_offline.pdf
    • https://uploads.strikinglycdn.com/files/68072ddd-ce6e-4032-915f-859b44642a99/zizijeweja.pdf
    • https://uploads.strikinglycdn.com/files/9c4739d9-2526-4176-b2fd-726f8e0750c7/pit_bike_track_melbourne.pdf
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_296e2427e2034195ade9dfe819456472.pdf?index=true
    • https://uploads.strikinglycdn.com/files/87b8ecfc-8111-4af7-b9dd-afc4da22fc84/how_do_i_get_my_ip_address_on_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/70e43944-2a75-44c7-9aec-4d28675d7c35/2020_game_releases.pdf
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_65d44d17e93b4097bd7bf4aac5bf707e.pdf?index=true
    • https://57eba762-b826-4879-8d7a-7f480aba2934.filesusr.com/ugd/e89c2b_773ab91bee794e44a7fdcba7efadc1ba.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_off000108ed.bin
69d465438e8ef8c9f768c9a1abfea87f85735f38535952d3e856e38865636659		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108ED 5112 bytes
font_01_sfnt_off00011a47.bin
e8788de06553374d1ad3399a1fe2bb760d1eb043d8abcca77bcf3a18bf9b08cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A47 11960 bytes

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