Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee500e4af6f38a3…

MALICIOUS

PDF

81.2 KB Created: 2021-03-22 10:31:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: fa5a9aca9dfde15bed210eae671ad6e3 SHA-1: 6756e66670e10466645a09ed918905b5c347906f SHA-256: 8ee500e4af6f38a33c536ff0618c73c0eb2a603eb17e40ab4a875c92f585c840
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. Many of these links point to disposable domains and appear to be part of a link farm, suggesting a malicious intent to manipulate search engine rankings or distribute further malware. The ML classifier and ClamAV detection strongly indicate malicious content, likely a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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://mezovuduw.ru/award?keyword=skills+for+project+managers+pdf PDF link annotation
    • http://greyfruit.space/android_police_pixel_4_reviewolo4x.pdfIn PDF document text
    • https://wenojuzak.weebly.com/uploads/1/3/4/2/134265903/3450578.pdfIn PDF document text
    • http://draiwenstore.online/20931160366sku7z.pdfIn PDF document text
    • https://wakelidegafu.weebly.com/uploads/1/3/4/0/134016727/9944305.pdfIn PDF document text
    • https://vetenejoxo.weebly.com/uploads/1/3/1/3/131379321/koxigejogegipow.pdfIn PDF document text
    • https://zomogazafef.weebly.com/uploads/1/3/5/3/135348967/gorol_pepewawoxitovu.pdfIn PDF document text
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/wekopamuvaduw.pdfIn PDF document text
    • http://excellent-spb.ru/extent_report_4_jar4snoi.pdfIn PDF document text
    • https://vobinuxidixuf.weebly.com/uploads/1/3/4/4/134471365/4088168.pdfIn PDF document text
    • https://finubakexa.weebly.com/uploads/1/3/1/3/131383318/18c74a1b0f8f9.pdfIn PDF document text
    • https://xuvelufuxilo.weebly.com/uploads/1/3/5/3/135387868/xufefuvax-vetojat.pdfIn PDF document text
    • https://doxefifuz.weebly.com/uploads/1/3/0/9/130969363/dotoxazeguwum_radubugorus.pdfIn PDF document text
    • http://creampiepow.club/saxon_math_intermediate_3_written_practice_workbook3ty5o.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/6297972.pdfIn PDF document text
    • https://faraxebeg.weebly.com/uploads/1/3/4/4/134475962/zivamasijute-kesiluzomidos-pabik-tinuwun.pdfIn PDF document text
    • http://trysoda.club/sulupabivuwlgddb.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://uploads.strikinglycdn.com/files/90086ec6-bb3a-4c18-b2d6-fd980b9320ad/what_is_the_wps_button_on_top_of_my_xfinity_router.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7903a43-416e-4620-8b32-956446795b0f/entry_level_software_engineer_jobs_houston.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22fbf37d-d33c-43c6-91a6-5ac3be78d0d9/69055739322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef0e43b-d5bc-455f-be12-edae3a93eaa2/woluvigilizidigezenunove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b0f2a53-219f-4da9-a12f-8843afe2fc00/38619485426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1252d2-3fa3-4688-b7d6-578ec0f282be/irobot_braava_jet_m6_6110_ultimate_robot_mop-_wi-fi_connected_precision_jet_spray.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b7d88f1-e650-4837-9d23-4371080f4873/can_you_trade_options_on_thinkorswim_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a55575d-ad31-475f-ba95-3f438436326d/voxoziraleximeti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a969389e-5aca-4411-823c-6aedf1314c5c/nirugebuxaxafisejuriv.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_off0000f3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DC 5508 bytes
SHA-256: e9eb4be522a42d14f2b17e2c09fbf5864b77d0e257ce0b9144d635cd02adac51
font_01_sfnt_off00010673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10673 10260 bytes
SHA-256: 60581eb8ade04e2b73167042065debd34c461355d641fa7ecfa8b682fb767bfd
font_02_sfnt_off00012956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12956 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2