Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd753349486112c0…

MALICIOUS

PDF

77.4 KB Created: 2021-03-16 22:22:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0441ee99e7abe20cfbfdeecf7fa22764 SHA-1: d09eb61c57cfd03f1414289c17831234aba3f633 SHA-256: bd753349486112c0b60ccfa3db56097ea00474c9b9e31362893265c65d54cd26
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a lure to a website, likely for phishing or malware delivery. The PDF_URI heuristic points to a specific URL that appears to be part of this malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/award?keyword=carmen+bizet+habanera+pdf
    • http://favodokoleti.mypressonline.com/york_centrifugal_chiller.pdf
    • http://tadezutalowebe.22web.org/argala_stotram_telugu.pdf
    • https://cdn.sqhk.co/filomada/hdkjguB/basketball_games_miniclip_unblocked.pdf
    • http://tupedesixavero.iblogger.org/bhootwala_picture_movie.pdf
    • https://cdn.sqhk.co/vadezewe/7J17Saj/brick_game_9999_in_1_unboxing.pdf
    • http://ladekepevij.mygamesonline.org/how_to_fix_a_leaking_refrigerator_water_dispenser.pdf
    • http://gixipures.sportsontheweb.net/peavey_vypyr_30w_pedal.pdf
    • http://xufaroruguvotel.iblogger.org/the_great_cosmic_mother.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1d67db7d-5026-4e2a-9b1e-9b98fac4ac63/autotrol_water_softener.pdf
    • http://wuwedutukuw.epizy.com/unlock_bootloader_xiaomi_mi_a2.pdf
    • https://s3.amazonaws.com/tinivukedeta/61560473285.pdf
    • http://bixozebaxikapos.atwebpages.com/homemade_wood_lathe_stand_plans.pdf
    • https://uploads.strikinglycdn.com/files/7cae9bd9-8b05-4998-b485-7dbff3e7ca96/new_york_city_court_officer_test.pdf
    • https://s3.amazonaws.com/bezutu/jitterbug_flip_phone_user_guide.pdf
    • https://uploads.strikinglycdn.com/files/285aabc7-07a6-4d10-941f-79c933682c4f/fluke_pro_3000_manuale_italiano.pdf
    • http://suxudogakol.myartsonline.com/deforestation_causes_consequences_and_solutions.pdf
    • https://s3.amazonaws.com/xujitezu/codashop_apk_hack.pdf
    • https://s3.amazonaws.com/kabisebax/scooter_software_beyond_compare_free.pdf
    • http://nanaxaj.rf.gd/bnmu_part_2_result_2018.pdf
    • http://tiriburud.rf.gd/what_is_the_purpose_of_narrative_essay.pdf
    • http://nanesipub.rf.gd/reading_plus_answers_level_f_mermaids_blood.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_off0000efff.bin
f9fe07b545ad26dea1ca4e343988a91303ecd42bf85ca8bf3ebd09fb1d47947b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFF 5168 bytes
font_01_sfnt_off00010167.bin
00390a9d969509a84e16caad0e23c08396c4bde30aa71837030a22b2027cf200		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10167 12416 bytes

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