Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafaad6bc5ada203…

MALICIOUS

PDF

99.4 KB Created: 2021-03-18 20:02:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 77f30070856fc3720febcf30967085a7 SHA-1: 1197ef38c83462a22f6e04eda0c7db1f98a8dfb3 SHA-256: bafaad6bc5ada203bcf1a7a0f856b9d7d13389ac58ff9f012dfa429cf036383c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://golowaki.ru/award?keyword=ultralight+backpacking+gear+list+pdf PDF link annotation
    • http://tidirakozodawon.getenjoyment.net/maya_angelou_poems_woman_work.pdfIn PDF document text
    • http://rolorutebu.sportsontheweb.net/pays_capitale_monnaie.pdfIn PDF document text
    • http://rixanemusijod.mywebcommunity.org/39308833773.pdfIn PDF document text
    • http://fibiver.mygamesonline.org/glossary_of_cost_accounting_terms.pdfIn PDF document text
    • http://baderezu.scienceontheweb.net/how_to_clean_dishwasher_filter_general_electric.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/malaysia_business_law_exam_questions_and_answers.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/shear_force_and_bending_moment_file.pdfIn PDF document text
    • http://dipazekonowa.mypressonline.com/sujijalovugowuxapijuroxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0b7627fc-4a71-4ae3-90f6-d680ea4bc0d8/53527940999.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/nutupuragagipozubom.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/hp_ultraslim_docking_station_d9y32aaaba_compatibility.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6510f8-91c9-41f5-a354-e5780815f706/1st_grade_math_activities_printables.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/10885532966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a7d9b4c-0c7f-42f2-84a3-6799dff18e7a/how_do_i_use_fuzzy_lookup.pdfIn PDF document text
    • http://fidalanono.myartsonline.com/1732076276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/defddee7-d0b3-4f3f-88a5-57918d77c221/los_pronombres_relativos_en_francs_qui_que_o_dont.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/how_to_read_electrical_drawing_and_diagram.pdfIn PDF document text
    • http://jazopizebe.atwebpages.com/reliability_centred_maintenance.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13677 5288 bytes
SHA-256: 1b357463b79c4acbe555357ce7c415e70d47d45f08213665b73b0dc496f48972
font_01_sfnt_off00014855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14855 12576 bytes
SHA-256: c1ebbbea0e559c2a65e229c8f78d3e78cfaf2e2b66e97e75ded669f2a3661a79
font_02_sfnt_off0001729c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1729C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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