Malicious PDF — malware analysis report

Static analysis result for SHA-256 97621b1ca1c2b053…

MALICIOUS

PDF

91.8 KB Created: 2021-04-03 02:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ab7912a41cd1b65cfcfa1ea5c7e3cf23 SHA-1: 1ed1be54ca98e7a0ee2064cee43579d5679a8387 SHA-256: 97621b1ca1c2b053b266a111f398bf4e36124d3ccaab5325f3a0c8e775917575
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9992

Heuristics 4

  • 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/strik?utm_term=sony+str-dh520+7.1+surround+receiver+bedienungsanleitung PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490371/normal_601710f189fa5.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/ihWY9nk/justin_bieber_bloodpop_friends_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/dgcTOih/best_twin_stick_shooters_on_switch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376379/normal_60053bfcca0cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_60328a146ad77.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/ujfhiij/unity_editor_int_vector2.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/gFhbsjh/comic_reader_windows_10_tablet.pdfIn PDF document text
    • http://gelipoxupiv.iblogger.org/14722980671.pdfIn PDF document text
    • http://gebikatafexanu.22web.org/big_boss_audio_songs_telugu.pdfIn PDF document text
    • http://remivitadiki.22web.org/61885268221.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/eo7Tqql/98229408903.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1681d7-0ac3-41e1-b89b-7dc84c2924f4/51202350818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed3e5b8-04a9-4426-a2dd-ffaee6ab84ab/trouble_obsessionnel_compulsif_dfinition_larousse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6701e79c-222f-4c3f-b6f4-7188de1e0673/ddp_yoga_workout_schedule.pdfIn PDF document text
    • http://perepidowowavam.epizy.com/sexarodon.pdfIn PDF document text
    • http://wukezize.rf.gd/jenanowesivejebidalevufuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/262b9035-0376-46ee-b105-c186483e01a3/57213854992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4769245-af96-475b-8b6a-bc4c374e2eb7/jagukagojedugodunepum.pdfIn PDF document text
    • http://nodimetonakijeb.epizy.com/63466319518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2447677f-72a1-4a6c-99ef-80431650d4ad/79748649739.pdfIn PDF document text
    • http://bosivatukan.rf.gd/how_to_get_a_free_drink_from_a_coke_vending_machine.pdfIn PDF document text
    • http://tisiwiruligeg.epizy.com/android_folder_programmatically.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69f53b33-263f-47ae-991e-6d95c48b5002/marvel_comics_release_dates_september_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a7e9185-6081-41b7-9297-7abca01fd76a/concepto_de_investigacion_cualitativa_y_cuantitativa.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_off000120ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EA 6200 bytes
SHA-256: f2bc804cba5606a93b51f69565a166ee616e71d58eda8ca568e8b1aff19dc040
font_01_sfnt_off00013624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13624 12520 bytes
SHA-256: e48071a8ccc551c6c90d14eca6cfca2d576ffc4e916a4c35707ab66df902dca8

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