Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a41a3f202f51add…

MALICIOUS

PDF

68.1 KB Created: 2021-02-27 16:59:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8685520918278b0b0081240dd5fc2ae3 SHA-1: 3b72d709b4d1b9065d01c3fa5dc20f8ef026b4f7 SHA-256: 1a41a3f202f51addff680c3ff32841e204514ebb5d7080a3095328d3460b2ddb
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/award?keyword=teradek+cube+155+recovery+mode PDF link annotation
    • https://suzagadagaxu.weebly.com/uploads/1/3/0/7/130775939/a05f4a1a1446.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/sukaw.pdfIn PDF document text
    • https://fofomobagukewe.weebly.com/uploads/1/3/4/3/134352826/ritezubuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_60339c89acd8c.pdfIn PDF document text
    • https://ripufimavewin.weebly.com/uploads/1/3/6/0/136099474/9213943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484376/normal_6021e7c106f14.pdfIn PDF document text
    • https://zevamomarage.weebly.com/uploads/1/3/4/6/134611313/bizijoxizuzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494657/normal_6023837c0ab55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487192/normal_5fe81ef715398.pdfIn PDF document text
    • https://nupurotuxi.weebly.com/uploads/1/3/4/8/134854616/janifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_600c1eff5d178.pdfIn PDF document text
    • https://cdn.sqhk.co/nadokikado/gFwv5hi/hill_climb_racing_highway_fuel_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/rgd0ULF/16524138245.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/shakira_song_whenever_wherever_video.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/fumonedoxepapadewupez.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/clarksdale_mississippi_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/adobe_premiere_pro_free_text_templates.pdfIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/does_gamestop_ever_have_coupons.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_off0000ce55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE55 5364 bytes
SHA-256: 6b3e6ae67551f40bb429497745024553ab996c603b625f28c359f7aabd013118
font_01_sfnt_off0000e09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09B 10196 bytes
SHA-256: fa8a21dfde4f3e88df1b271f32cb55262c7c6993fb2256eae33ea7b56073eabd