Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e73cce861b1546…

MALICIOUS

PDF

71.0 KB Created: 2021-04-06 13:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c9846eaf6c9ec9313052ce0dbb62a02 SHA-1: df2d7fea27ecc6bc615581a8b7a3172ffb339543 SHA-256: d1e73cce861b1546b95afc2b1476e2b86080c8dc1f7c51eba550ba9a2ef7b4fe
136 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate suspicious link lures, with one pointing to a domain commonly associated with phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malware or providing credentials. No scripts were extracted, but the presence of multiple suspicious URLs indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://midufefew.ru/wix?keyword=chapter+5+quiz+algebra+2+answers
    • https://cdn.sqhk.co/merabuvi/WidFQ3n/pizza_delivery_jet_ski_funnies.pdf
    • http://gafaneripebenu.iblogger.org/balancing_equations_worksheet.pdf
    • http://copyright-central-media.com/onkyo_tx-nr515_problemswsmg9.pdf
    • http://loginwithfb.site/weather_map_symbols_worksheet_answersed2dt.pdf
    • https://cdn.sqhk.co/mewuxedodi/hcVJLia/stampede_word_meaning_in_malayalam.pdf
    • https://cdn.sqhk.co/jevamivuvugi/iahi3sD/basketball_trick_shots_ideas.pdf
    • https://cdn.sqhk.co/pujunuzivas/gfhjfhf/conquest_synonym_word.pdf
    • https://cdn.sqhk.co/nowegizin/ge9VThg/bootstrap_4_glyphicons_cheat_sheet.pdf
    • https://cdn.sqhk.co/livatunozasu/hdHuIif/the_ice_cream_parlour.pdf
    • http://lupaper.22web.org/76696501995.pdf
    • http://icub.tech/can_alexa_answer_in_spanish1otwz.pdf
    • https://cdn.sqhk.co/zenujulikik/ALjhPyJ/pamupinunejomo.pdf
    • https://cdn.sqhk.co/porosobof/ilIWjiz/84412714261.pdf
    • http://zavodtriumf.com/parrot_hands_free_car_kit_installationrwaec.pdf
    • https://cdn.sqhk.co/gotirawuz/jfOhchf/material_safety_data_sheet_for_glass_beads.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vapoborino.rf.gd/realidades_1_capitulo_1a_answers_page_15.pdf
    • https://uploads.strikinglycdn.com/files/847c2ce6-fcff-4ec2-a184-249c5191c736/80220738149.pdf
    • https://uploads.strikinglycdn.com/files/2012a6ae-b612-4120-ad84-e5e2d68348fb/92980941158.pdf
    • https://uploads.strikinglycdn.com/files/28b5cb06-372d-4b1a-aff5-0c88b43979a8/around_the_world_in_80_days_cast_original.pdf
    • https://uploads.strikinglycdn.com/files/6aeeb89e-6aed-4d0f-8561-596848fe686f/craftsman_lt_1500_parts_manual.pdf
    • https://uploads.strikinglycdn.com/files/ad234da8-ee9e-4140-a863-443b45ece529/gusitufufezi.pdf
    • https://uploads.strikinglycdn.com/files/4af2979a-4f65-409e-8487-3cde106e6c42/keurig_2.0_k300.pdf
    • https://uploads.strikinglycdn.com/files/dc80ef3b-93b4-4356-bb36-2ddfe250eecc/bosch_dishwasher_silence_plus_44_dba_not_turning_on.pdf
    • https://uploads.strikinglycdn.com/files/b04eb385-7271-45b8-bed2-338911cbbf43/how_much_is_ps4_slim_worth.pdf
    • https://uploads.strikinglycdn.com/files/57ecfc2d-2f16-442b-a10c-f9046af694cf/how_to_make_a_simple_lego_gun_without_technic_pieces.pdf
    • https://uploads.strikinglycdn.com/files/547252f1-a813-44a1-a643-17ccf72a9239/vewegotozadawo.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_off0000d632.bin
16ff079481b95bd2cfe393a354b3dc47ed26dd7f6097b6dee6e22169568b3041		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD632 5652 bytes
font_01_sfnt_off0000e979.bin
f96185d0b90f59c9bfcf38cb36e35a67e0aea2a06504e61558d4dd24caf90cf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE979 10856 bytes

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