Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb5e76c6c2e4027…

MALICIOUS

PDF

76.6 KB Created: 2021-03-13 15:00:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc4ddff258ba68f12c03b61b2c04dbb3 SHA-1: dcbc41d63ff9f252340d20df41045595c074f557 SHA-256: aeb5e76c6c2e4027a4be7aa07465646fcf756a5027702306d0bf8000a6519174
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://lozipotod.ru/wix?keyword=pascal%2527s+triangle+activity+worksheet', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, indicates it is presented as a 'Pascal's triangle activity worksheet', a common lure for educational or work-related phishing. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://lozipotod.ru/wix?keyword=pascal%2527s+triangle+activity+worksheet
    • https://cdn-cms.f-static.net/uploads/4366057/normal_602e7179d6ada.pdf
    • https://static.s123-cdn-static.com/uploads/4422909/normal_6008b43bbe870.pdf
    • http://gisoboxizaza.mygamesonline.org/100_chart_with_missing_numbers.pdf
    • https://static.s123-cdn-static.com/uploads/4423699/normal_5ff85dffdb2e3.pdf
    • http://fuwijumazawad.mywebcommunity.org/angular_4_interview_questions_for_experienced.pdf
    • http://kopuvimu.scienceontheweb.net/dotube.pdf
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5fd79d330f255.pdf
    • https://static.s123-cdn-static.com/uploads/4451028/normal_5ff3b8155d4b2.pdf
    • http://zuvalasit.mypressonline.com/oracle_pl_sql_developer_certified_associate_salary.pdf
    • http://jefevivavifax.scienceontheweb.net/how_to_make_climate_diagram.pdf
    • http://wirufebo.22web.org/48945429995.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/midipes/80981068785.pdf
    • https://s3.amazonaws.com/rewepalazamiso/abhimaan_full_movie_bengali.pdf
    • https://s3.amazonaws.com/dazovosugev/4003985299.pdf
    • https://s3.amazonaws.com/xulikamul/presto_cool_daddy_fryer_instructions.pdf
    • http://lilufunom.epizy.com/19722936779.pdf
    • https://s3.amazonaws.com/kisagoz/sudijobes.pdf
    • https://s3.amazonaws.com/geradi/hiking_stick_height_guide.pdf
    • http://mosujala.rf.gd/65305612149.pdf
    • http://fuvarijes.atwebpages.com/61236159669.pdf
    • https://s3.amazonaws.com/dufekifaral/royal_caribbean_deluxe_beverage_package_sale.pdf
    • https://s3.amazonaws.com/vavale/nakamichi_nk6_universal_remote_code.pdf
    • https://s3.amazonaws.com/kiremefegonar/game_angry_neighbor_apkpure.pdf
    • http://vobozezojip.onlinewebshop.net/organic_nomenclature_practice_problems_with_answers.pdf
    • https://s3.amazonaws.com/potamotaz/one_million_twelve_thousand_sixty_in_standard_form.pdf
    • http://tiwatimab.atwebpages.com/how_to_address_board_members_in_a_letter.pdf
    • http://tuvatopuvonu.epizy.com/74464604099.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_off0000ee58.bin
a81e2cc935d9130f86de52f5437f84425a66095a6ebd388af3830cd6c771d333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 5416 bytes
font_01_sfnt_off000100de.bin
8a718c9a6d2c3dba64717185d9997bce85de5d46d75cce366b1faf9791678f31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100DE 10244 bytes

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