Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eda36f24a317d4f…

MALICIOUS

PDF

36.1 KB Created: 2020-11-02 12:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6ac41d09fc3aba4321a8d3c4db1b4790 SHA-1: 2dbf44223f9772410a36bad695daf2345185dfc9 SHA-256: 4eda36f24a317d4ff79c73616a97dc6b9e3be5cb7ec2712c96325843d7a33fac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 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/123?keyword=the+son+of+bigfoot+full+movie+123+movies In PDF document text
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/737298.pdfIn PDF document text
    • https://najutumivuzobo.weebly.com/uploads/1/3/4/4/134473994/bf2e670f.pdfIn PDF document text
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/jodez_sapekomefixunup_luzupax.pdfIn PDF document text
    • https://jezulusawuse.weebly.com/uploads/1/3/4/0/134000263/08808e98.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/wejadafi-lanefemo-fejumilaxopevon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0509/5489/5520/files/sid_meiers_pirates_tips.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8544/0170/files/16367366414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5043/4211/files/43581406109.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/55866275646.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/55431910499.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/zanuzaxajidijejuzetuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/judejakuxewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0658/5755/files/wps_connect_pro_apk_onhax.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_off00004c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0D 5372 bytes
SHA-256: 15fcfadf93034cf5ea7ee4c0bd1b333a85e13e135120c8775a7e407f32e972cb
font_01_sfnt_off00005e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4C 10824 bytes
SHA-256: c794a1848f9077878714b9014f3398850ffcb71a77f4371a7088bbcc641257eb

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