Malicious PDF — malware analysis report

Static analysis result for SHA-256 856fc9e1324c2606…

MALICIOUS

PDF

55.7 KB Created: 2020-10-15 06:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: c5ec23cf8a844a757ea3495e6d335cf9 SHA-1: 77a6f510378e47e8a4ed9f1bdf1b483bc35afb87 SHA-256: 856fc9e1324c260651871114c352c50cd05770ad8fc014ca4a4102d82c54ae3d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?keyword=manualidades+de+navidad+faciles+para+hacer In PDF document text
    • https://ruwopevod.weebly.com/uploads/1/3/1/3/131397973/d7e08.pdfIn PDF document text
    • https://waniremupamed.weebly.com/uploads/1/3/1/4/131407535/mazuwevibejelubolo.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/2911433.pdfIn PDF document text
    • https://site-1037897.mozfiles.com/files/1037897/bikijawuz.pdfIn PDF document text
    • https://site-1039970.mozfiles.com/files/1039970/1545429547.pdfIn PDF document text
    • https://site-1038744.mozfiles.com/files/1038744/47858247781.pdfIn PDF document text
    • https://site-1036991.mozfiles.com/files/1036991/63163425398.pdfIn PDF document text
    • https://site-1042585.mozfiles.com/files/1042585/68649420909.pdfIn PDF document text
    • https://site-1040041.mozfiles.com/files/1040041/4802017458.pdfIn PDF document text
    • https://site-1042737.mozfiles.com/files/1042737/20022043991.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/53e41d8972de40.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/fibawubaxavuvabu.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/somulimezopomab-nolapuxoduvamak.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/15a30b0ef.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/c893a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c87e5678-14e3-487c-aab4-e05326b4f07a/xarumuwarelanezukuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18f06b5a-2245-4983-b16b-d32df3bfe8e0/rojabazupuwit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c78a1e-863b-41df-ab91-73eaa7f37bcb/punujixuwuxanutegeras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cffd9711-1557-4ced-a37e-771930bf673c/xobigesobukumugu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A9 5308 bytes
SHA-256: 580e671b6711b3d1d62da2bc3d8cb204fcf455395f0088e8a9e4a4ba55f82c3f
font_01_sfnt_off0000abbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABBD 11028 bytes
SHA-256: cdefd88dd8029583dd4f51ab4c1be10441de33d2fe91bd381e511bc18313052f

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