Malicious PDF — malware analysis report

Static analysis result for SHA-256 c90f2e2ddb0f3a61…

MALICIOUS

PDF

74.8 KB Created: 2021-04-05 03:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 832b5def49964233069a7fe143e4d913 SHA-1: c2ef05a6344b136afd5aa0290ce9ec669c0f4b64 SHA-256: c90f2e2ddb0f3a6196b8460def6f07b6c10e86aaa0c3c7b68458f6ee3595954c
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 0.9993

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://xajibur.ru/strik?utm_term=cannery+row+book+sparknotes PDF link annotation
    • https://sikenobavusemel.weebly.com/uploads/1/3/2/6/132682861/004327.pdfIn PDF document text
    • https://dugemitisij.weebly.com/uploads/1/3/1/4/131409309/sivuso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467601/normal_601d63c21ecc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_6016d01f60aa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383703/normal_60508ec2de780.pdfIn PDF document text
    • http://sokobumoxagug.scienceontheweb.net/dazemekinototutonogodo.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/65551732642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_5fd376e1daf53.pdfIn PDF document text
    • http://tasefuvakol.22web.org/emulator_for_android_to_run_pc_games.pdfIn PDF document text
    • https://rijagadufe.weebly.com/uploads/1/3/1/6/131606992/gawuwijuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_6021e83debc3b.pdfIn PDF document text
    • https://butevexonukuzi.weebly.com/uploads/1/3/2/6/132681970/e88600dd62.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimixof.onlinewebshop.net/excel_vba_programming_coursera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/545babcc-590c-454c-a002-4950e39b4213/how_much_does_computer_repair_cost_per_hour.pdfIn PDF document text
    • http://nezaliwelu.rf.gd/how_to_make_paper_butterfly_step_by_step_instructions.pdfIn PDF document text
    • http://wowulikuvej.rf.gd/46950376028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a349142-2154-43c3-895e-362aa33468fb/mojopejoz.pdfIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_7a59c216cf5643139308e9327456e85c.pdf?index=trueIn PDF document text
    • http://betakudo.atwebpages.com/davirisubeximew.pdfIn PDF document text
    • http://pavitekoruw.rf.gd/absceso_odontogenico_tratamiento.pdfIn PDF document text
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_a853e457f2d44fd684c5557fa2a6e711.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeb0f35d-b645-41a8-a5bc-ee115493c9bd/59463192474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b425ff47-5c51-4a69-b394-f6fb262deb22/5809042436.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_off0000eaa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA6 5084 bytes
SHA-256: eb2851baf6346d9abb18274dfef2b121f307facd5b5c8802447827a09a244cac
font_01_sfnt_off0000fc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC13 9936 bytes
SHA-256: 421ccda1d2c14f817ca292fcd3932a95145d0cfcae5ce47164ad544587acac5e

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