Malicious PDF — malware analysis report

Static analysis result for SHA-256 35031949eefc2311…

MALICIOUS

PDF

82.8 KB Created: 2021-04-01 12:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 36490e038d0b2ea14acc568ad0c9a271 SHA-1: 62e66efd6f4f776f64a798374c1621636cd3ae4e SHA-256: 35031949eefc23114024796e969c452edfae024e6864ddc2270a0e0724b6b365
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL (`https://jumiwimov.ru/wix?keyword=usb+loader+wii+black+screen`) appearing to be a lure for a specific product search. The PDF is flagged as a link farm on disposable hosting, indicating a high likelihood of malicious intent. ClamAV detection and ML classification further support its malicious nature, suggesting it's used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/wix?keyword=usb+loader+wii+black+screen PDF link annotation
    • http://potaberukogox.66ghz.com/sowoxawaguzimisi.pdfIn PDF document text
    • http://martakkord.ru/yamaha_moxf6_review_sound_on_soundkp7hk.pdfIn PDF document text
    • https://lupilonugugi.weebly.com/uploads/1/3/1/6/131637558/velexedet_zunexozi_wilakelovesoker_bepekuzizakis.pdfIn PDF document text
    • http://fabulouss.space/52462793349jueki.pdfIn PDF document text
    • https://wosiwimobej.weebly.com/uploads/1/3/1/1/131164223/megelo_bogapeluxariw.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/programas_para_monitorear_redes_en_windowsaukzh.pdfIn PDF document text
    • https://sotezogurew.weebly.com/uploads/1/3/2/7/132740991/bemologetajevifuluz.pdfIn PDF document text
    • http://zibukebolavor.22web.org/41723727911.pdfIn PDF document text
    • http://topcreditcheck.info/38491376247odw1n.pdfIn PDF document text
    • https://divulonuwuw.weebly.com/uploads/1/3/1/4/131482828/4508528.pdfIn PDF document text
    • https://zexebige.weebly.com/uploads/1/3/0/8/130813378/8982845.pdfIn PDF document text
    • https://fuketuxe.weebly.com/uploads/1/3/4/4/134495293/mabufugu-janewumanu-danitaki.pdfIn PDF document text
    • http://cleaner360.shop/zibep6yl72.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://s3.amazonaws.com/xukonakefules/formulas_de_volumen_de_solidos_geometricos.pdfIn PDF document text
    • http://boxosupeteb.epizy.com/western_snow_plow_wideout_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60b914a6-596e-4163-af54-7b6170a1301a/the_cognitive_perspective_in_psychology_focuses_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb65d53-0ab0-4dfc-83c3-2f7c16ec5b77/definition_in_reading_and_writing_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/61194703024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c97390-bd6b-4abd-89f0-125a83b19aee/how_to_clean_an_electric_roaster.pdfIn PDF document text
    • http://zevebetuj.epizy.com/1992_mercury_xr6_150_lower_unit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd1c367-5c22-41b7-9f5d-ddb524a574a2/what_happened_at_the_end_of_the_veldt.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/vebipat.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/command_form_reflexive_verbs_french.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_off0000f63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63B 4928 bytes
SHA-256: 0d806b706a69d81c7ccfb19d7594eab00e38363bafa088058f097efc9bb9c126
font_01_sfnt_off0001070d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070D 12688 bytes
SHA-256: 9d8a9be8c03c9cc43a500a12a25a2423f5eb05c3a95173e5589574173eb147e7
font_02_sfnt_off00012fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f