Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d3b8a641959010…

MALICIOUS

PDF

81.0 KB Created: 2021-03-14 20:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7673645f1c32fa161a8de331dd4f4da3 SHA-1: 4c17664e2b78fed0d4bd2695370d8d34fd36673b SHA-256: 26d3b8a641959010148269580f70c02943d7d26448aa43fc4d12f56b0860c1f0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable domains and exhibiting characteristics of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/123?utm_term=inherited+ira+rmd+tax+reporting PDF link annotation
    • https://cdn.sqhk.co/lutumodigi/eijeija/30495039842.pdfIn PDF document text
    • http://baxusajatos.sportsontheweb.net/what_is_base_rate_fallacy_mean_in_psychology.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/best_indoor_soccer_training_equipment.pdfIn PDF document text
    • https://cdn.sqhk.co/zevivovakok/Xgiz7nY/tic_tac_toe_family_day_care.pdfIn PDF document text
    • http://lukiduxipapep.mywebcommunity.org/god_and_the_state_bakunin.pdfIn PDF document text
    • https://cdn.sqhk.co/nomevagume/aFujHym/deroga.pdfIn PDF document text
    • http://all-system7.club/dazitulux21pd.pdfIn PDF document text
    • http://kamini33.ru/6087678060546ruq.pdfIn PDF document text
    • https://cdn.sqhk.co/xinosemu/hbnXihr/teachers_assistant_interview_questions.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/tyson_critical_theory_today0yjbh.pdfIn PDF document text
    • http://insurancecarusa.com/how_to_replace_door_switch_on_kenmore_elite_he4_dryerfgio9.pdfIn PDF document text
    • http://theraisins.pro/corona_kerosene_heater_sx-b22a_manualwgkw3.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/7877832229.pdfIn PDF document text
    • http://itawegan.space/lijofogejorulaxakujopafejyd250.pdfIn PDF document text
    • http://moshon.space/what_3_things_is_meat_composed_of8mkn9.pdfIn PDF document text
    • http://alania365.ru/python_3_regex_cheat_sheetw0ytp.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/lego_harry_potter_1-4_hogwarts_gold_bricks.pdfIn PDF document text
    • http://lg-supportteam.com/friedrich_nietzsche_theorytxr23.pdfIn PDF document text
    • http://nosixavol.sportsontheweb.net/what_are_the_10_korean_vowels.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/cookery_classes_listening_answers_ielts.pdfIn PDF document text
    • http://pebomotixot.myartsonline.com/one_way_anova_using_spss.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/preposition_worksheets_with_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/kisawuvute.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/panonupiduxofefidobate.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/nalituvufomumowulep.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF15 5168 bytes
SHA-256: ec01523c0467dd1c76ff886dd21cad291210c03137834d8c529015b9edfd650e
font_01_sfnt_off00011085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11085 11032 bytes
SHA-256: 782d5c647bf8fbd462e096bb8ab28a32c2113b2a0f592e4d1428e342d0024cb7

Open this report in the interactive analyzer, or submit your own file for analysis.