Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed16a89af97d3760…

MALICIOUS

PDF

70.2 KB Created: 2021-03-20 15:27:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e27b8995f7bb766e22b3e7f25dc2f7d3 SHA-1: bd55ab4952716ff8df27eca53d9e92035b1a5cbc SHA-256: ed16a89af97d37605d3e52f9785836efad2e0b40027de8c9e910bbdb397a1734
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by an ML classifier and contains a significant number of external links, many pointing to disposable hosting. The primary URL, https://leonvi.ru/strik?utm_term=bissell+powergroom+helix+rewind+how+to+use+hose, suggests a potential SEO manipulation or phishing lure. The presence of a link farm on disposable hosting indicates an attempt to obscure the true malicious intent or distribute potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=bissell+powergroom+helix+rewind+how+to+use+hose PDF link annotation
    • http://pugezesiw.mygamesonline.org/how_much_is_it_to_lease_a_2020_honda_civic.pdfIn PDF document text
    • http://kunewalijaxuna.getenjoyment.net/mental_ability_test_tamil.pdfIn PDF document text
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/16f42c1.pdfIn PDF document text
    • https://telejifuzi.weebly.com/uploads/1/3/5/3/135313468/sozijopemadu-sowun-bisoxadalez.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/virajijisisimijuwabitomo.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/5cb07d83-c50e-412a-96ea-e3bb611b3870/53430340450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db11a1b0-c9ad-4132-9d5f-a5a8fda36691/85335171207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8bb4fe1-f818-4508-822c-9a0caa33501c/do_animals_have_free_will_in_the_bible.pdfIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/37580774188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/491d8231-e233-4ab2-aafe-30edad4fbd55/troy_bilt_self_propelled_mower_with_honda_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/nubibanizixusopij.pdfIn PDF document text
    • http://xujided.onlinewebshop.net/40781369403.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/descargar_biblia_lenguaje_actual.pdfIn PDF document text
    • http://wififeju.atwebpages.com/pivijigog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8961a510-711e-4208-9698-876a4ee94fc2/taco_bell_buffalo_chicken_nacho_fries_nutrition.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/hp_7520_will_not_print.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/395ad189-38ea-44ac-a139-d6488ceaed19/in_the_heights_movie_casting_call.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e3d453-571e-456c-b9b3-1d7857ad24fe/81940824087.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_off0000d2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E9 5372 bytes
SHA-256: 4121fcc3acd0dc8403afe7dbf8fd37b473e487e501c5d29b36877c0ae57e1303
font_01_sfnt_off0000e51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51D 10800 bytes
SHA-256: 346a850c512f820fb28a1dc29afd0ff1c9de64a441b2f374f512403fa14106b2

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