Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fd1a2704531100…

MALICIOUS

PDF

63.0 KB Created: 2020-11-09 12:55:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: be192195d3548254c30aa0f3295a04a2 SHA-1: 98d630943815831af1d4a5b1f5f2b2fbbcc5d4ae SHA-256: e5fd1a27045311007d06486f5442c05a89c69f2ac26966cd7b8619bdcaeaa535
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link farm and embedded URLs, indicating an attempt to direct users to external malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external links suggests a campaign to drive traffic to potentially harmful websites. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or spam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://trafffi.ru/aws?keyword=new+zealand+biome PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379385/normal_5f94141fd6655.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/zixukexinufijalifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5fa21b2b73c90.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/632ca5f1.pdfIn PDF document text
    • https://zixokamewi.weebly.com/uploads/1/3/4/3/134386319/2078734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_5f96a57c5a695.pdfIn PDF document text
    • https://nakefofomiruni.weebly.com/uploads/1/3/4/4/134483242/jabuluga_zusatazefu_bigupagitaruwu_jobowulenu.pdfIn PDF document text
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/1755594.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://s3.amazonaws.com/senodiw/26169884532.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/xoxitux.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/cnc_machine_files_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/luremoxupumo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB8F 4656 bytes
SHA-256: 0ac5bd37541eda103d63bf52a6439b630beffeb43016a6ca7108a90d1bb1b156
font_01_sfnt_off0000bb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB57 11144 bytes
SHA-256: a21b4742f312165065a0185b415e39654c14f6bacdf2543cf6dfe55338a1abd0
font_02_sfnt_off0000e119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE119 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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