Malicious PDF — malware analysis report

Static analysis result for SHA-256 eefecbe0fc7d5160…

MALICIOUS

PDF

77.7 KB Created: 2021-03-12 08:31:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 04aec837f632c663f4b07df163d0feac SHA-1: 0cb6f77dfb98f8b44a486952475f254221d2cf1f SHA-256: eefecbe0fc7d51605b1526341cccc760ecd4a0c47c8d9c16977d918d0df1fce1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with at least one pointing to a suspicious domain ('botokaw.ru') that is flagged as external. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, suggesting a phishing or spamming operation. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/award?keyword=truy%25E1%25BB%2587n+andersen+pdf PDF link annotation
    • http://melowimaz.getenjoyment.net/what_is_an_isekai_anime.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/36107835294.pdfIn PDF document text
    • http://ruwosiju.getenjoyment.net/declaracion_francesa_de_los_derechos_del_hombre_y_del_ciudadano_1789.pdfIn PDF document text
    • http://viwoxufegoger.sportsontheweb.net/weathering_and_erosion_worksheets_high_school.pdfIn PDF document text
    • http://fefikaniki.22web.org/fusionner_2_avec_windows_10.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/block_format_letter.pdfIn PDF document text
    • http://dezimazokuxulil.mygamesonline.org/how_to_start_business_plan.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/how_often_do_breastfed_babies_poop_at_1_month.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
    • http://sokiguxesixup.epizy.com/golds_gym_420_treadmill_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de501cce-1b4c-4ff1-abe0-f5e592de822a/7259850661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea1c4e34-274d-4856-a2e5-68da2638ad9d/how_to_downgrade_ps3_firmware_4.87.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8921b4a3-72f7-409a-aba8-b95901a690e3/79102235034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a97b776-e91c-4e3e-90b5-29a2d02e6348/tatonixefarowuzezodoxumin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce95f9c3-52d6-4d32-9216-9262fe4daad0/pufawepejexupenizakowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5fa7981-4f99-444d-88e3-4c0767b7d5fb/pemiworup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab1a7817-7550-4df1-ae97-f2c2bae841cb/85736818063.pdfIn PDF document text
    • http://vidobif.epizy.com/24131995081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3720553-6ee8-4ae9-8734-ed4c6b38e040/85748843900.pdfIn PDF document text
    • http://wewiligeva.epizy.com/99806355747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ea1af97-fd8c-465d-bdeb-2eaae02df07e/john_deere_755_60_inch_mower_deck_parts_diagram.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_off0000e75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75E 4868 bytes
SHA-256: c0645d8fe9d0654fd4b2ae38de05e29b3909bff3302c29980481cb164e8db584
font_01_sfnt_off0000f7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AD 10004 bytes
SHA-256: e9196747e7e34207ec836648b7b4aa2d4455e81c8f43a0970a3e1fa0620caba3
font_02_sfnt_off000119fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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