Malicious PDF — malware analysis report

Static analysis result for SHA-256 75cb0bf68d8b0761…

MALICIOUS

PDF

80.8 KB Created: 2021-04-02 03:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f52b116c3e5e436514fbd7550eb9941b SHA-1: d94ff693870fc02f5c690d24112e2387f99e9bef SHA-256: 75cb0bf68d8b0761fbe49c5fce82cc6bd2c704e480463c604e4f52b2dbbe9460
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • 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://ponafet.ru/wix?keyword=limiting+reactant+and+percent+yield+problems+worksheet PDF link annotation
    • http://kalukawuwo.mygamesonline.org/grammar_practice_book_grade_2_answer_key.pdfIn PDF document text
    • http://pigofumibimu.iblogger.org/celtics_schedule_2020.pdfIn PDF document text
    • http://megantv.site/can_you_sue_a_guardian_ad_litem300oz.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://fasad-dom.site/63042352958ncefd.pdfIn PDF document text
    • http://hotsales-com.xyz/89121161901ipkui.pdfIn PDF document text
    • http://zerkalo-fugicar.website/young_thug_jeffery_download_zip7oi9m.pdfIn PDF document text
    • http://beduzevitugok.mypressonline.com/is_there_a_book_of_enoch_in_the_catholic_bible.pdfIn PDF document text
    • http://wexexazemulo.iblogger.org/love_story_piano_sheet_music_chords.pdfIn PDF document text
    • http://zopaxonurur.iblogger.org/nutritional_information_whataburger_honey_butter_chicken_biscuit.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/vufupu/autodesk_vault_2016_client.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15144206-7aa6-48c0-b657-86e486500400/tafidapota.pdfIn PDF document text
    • http://fuxivupinamipi.rf.gd/business_process_improvement_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/xunulodam.pdfIn PDF document text
    • http://lunijikujapike.epizy.com/formule_calcul_anatocisme.pdfIn PDF document text
    • http://zijedan.atwebpages.com/jumpstart_to_skinny.pdfIn PDF document text
    • http://dapekafuxururo.myartsonline.com/sinhala_alphabet_letters_with_pictures_and_words.pdfIn PDF document text
    • http://kasesapat.rf.gd/google_cloud_computing_certification_training.pdfIn PDF document text
    • http://wusekugu.rf.gd/66162519596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd48ceb5-19b0-42d9-8de9-e78d839a07f9/petixoxusolidofajimede.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/vasipuvekapilop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c46dc0e-a1bd-49da-bfa9-f522e1eef9f1/6.0_powerstroke_external_transmission_filter_housing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/331ac1e4-91fd-48b0-82e0-cc36ae359e97/how_to_turn_on_blendtec_blender.pdfIn PDF document text
    • http://towupew.epizy.com/87632049931.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/difference_between_bacteria_and_virus_quora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63fb0b4-aaa3-4213-90e9-6b64802371a9/do_you_capitalize_job_titles_without_a_name.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/are_wrist_blood_pressure_monitors_accurate_reddit.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_off0000fbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF7 5828 bytes
SHA-256: 14da7358cae023a89ee5b42899350f9d558691e3632a6b50c4af18e49b9936de
font_01_sfnt_off00010fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB3 10252 bytes
SHA-256: 84c108f35a5c9bb3115e735b7618e9253c7917c4b79d53612d701db4d0dc4447