Malicious PDF — malware analysis report

Static analysis result for SHA-256 825774922b412e33…

MALICIOUS

PDF

40.4 KB Created: 2020-10-29 03:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 79a433e5dd0931696840f8e369560bf3 SHA-1: 498712c937fab3cd193ee5f7eff7100edacc5ed4 SHA-256: 825774922b412e339492d3d4ad9a31bbeaeebe0a072a438b279b0111b73229d5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and contains a significant number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to distribute other PDFs. This suggests the primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/strik?keyword=a+crosby+kennett+middle+school In PDF document text
    • https://bugadubotureje.weebly.com/uploads/1/3/4/4/134468403/2eb446512764.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/ca38f533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_5f8bcb93dddb8.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/4134607.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/xowunilitefojeg-gigusiza.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/2022221.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/e22e4e7604.pdfIn PDF document text
    • https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/eeae6e0d01f8.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/wisezezibi.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/4023336.pdfIn PDF document text
    • https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/282441ef.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/sulifip_bimewu_wevobami_fivixibileso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5f91118169e5d.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/fusidejebi/92889982904.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/salon_business_plan_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/pipofopatolaxanaji.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/boduxonosel.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/98023766656.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/loputiz.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/kibatejejuri.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/37998370506.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/moxabevevatofosala.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_off00005cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC9 5264 bytes
SHA-256: daff13e3f374383652a65d42529f99d75fd8bd104583cd2de6fcd2bb18814478
font_01_sfnt_off00006e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8F 11404 bytes
SHA-256: 2d25a0e8a3da36ce60a643d2f20153b9ee63eced1fd032717e72c097db935702

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