Malicious PDF — malware analysis report

Static analysis result for SHA-256 62029b071eb86ed3…

MALICIOUS

PDF

41.2 KB Created: 2020-11-02 13:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dae2cb122358598b094fbd16ecf1ca4c SHA-1: 22002f4bf4f4dbc667bf903ffb2721ec77720991 SHA-256: 62029b071eb86ed34b6f62750437629b4d2fedeb671c38c58be78eeccf37c5da
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=samsung+series+6+6200+user+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5f93ec94af7e5.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/vubadevudi.pdfIn PDF document text
    • https://wudizibi.weebly.com/uploads/1/3/4/4/134477582/9cb35c769a4e0.pdfIn PDF document text
    • https://fobedixosofano.weebly.com/uploads/1/3/4/3/134377241/genajojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_5f948bf0a2ad0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f8722116a13a.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/wigomedinazokana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388611/normal_5f8f591e167af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_5f9f2a5a0bf11.pdfIn PDF document text
    • https://mobajexiv.weebly.com/uploads/1/3/4/4/134455683/sebutok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450428/normal_5f9f65e5e8593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5f878d130ed16.pdfIn PDF document text
    • https://dikanutedageke.weebly.com/uploads/1/3/4/4/134457663/8240329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375703/normal_5f924652a5709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f91f92ab2768.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/rimepusox/gw2_hero_point_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/fejixufakarat.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_off00006067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6067 5536 bytes
SHA-256: 8c7dc6b06b2b90816d8fd0c1c0409e1e82f32190fd38ec7c686260117bd93da8
font_01_sfnt_off00007318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7318 10860 bytes
SHA-256: cc9739d69cb961ff1c31af68e2ffd56147ea819f258c80fc97269527aba22740

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