Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba69c68ef484b278…

MALICIOUS

PDF

72.2 KB Created: 2021-10-01 01:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 0604e157f747971d3c3dad8201f9ee2d SHA-1: 8aa3d3f5916b38f6ba44ddaecf49f6011ca277e0 SHA-256: ba69c68ef484b2786a3efc2e285e40f006315902a65c93c00ea1c8f61f62a05b
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier flagging it as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, suggesting a tactic to manipulate search engine results or drive traffic. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://hoadon-dientu.net/images/files/wefaliwodovavez.pdf In PDF document text
    • http://www.europesolidaire.eu/userfiles/files/78008584485.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/lazujajivapofen.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/7128094833.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/fisusibum.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/tonijebixenopivomasakenap.pdfIn PDF document text
    • http://shamayachts.com/upload/file/vakex.pdfIn PDF document text
    • http://piscesappliances.com/userfiles/file/2724482506.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/nevijanafutixoze.pdfIn PDF document text
    • http://apothepharma.com/upload/files/47662335292.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/5881203465.pdfIn PDF document text
    • https://contemporaryteas.in/admin/uploads/file/vodowaxegezivukogo.pdfIn PDF document text
    • http://indianapit.thriftstorewebsites.net/flash/indianapit.thriftstorewebsites.net/file/deviwula.pdfIn PDF document text
    • http://kystar.net/filespath/files/20210923002649.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/pibipetesigivu.pdfIn PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/zojuguduzisofutaf.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/47957888265.pdfIn PDF document text
    • http://cdio.vn/uploads/userfiles/file/rigesinivujudiz.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/kulavu.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/gifijupanutubimererukawug.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/63965281847.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/58653848896.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/danuwowufu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=explain+primary+and+secondary+memory+of+computerPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB471 11080 bytes
SHA-256: ce6e79568ff8d3288bb51db33866dd161ec8b3476558753b84415a35d20a7a23
font_01_sfnt_off0000ce45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE45 17432 bytes
SHA-256: 0dc143f48bb9602c6d481031bf7fee58f443d85c49c1b6cdb54e826bcce2cc6e
font_02_sfnt_off0000fad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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