Malicious PDF — malware analysis report

Static analysis result for SHA-256 663650acb8f5baac…

MALICIOUS

PDF

42.5 KB Created: 2020-11-08 10:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 81f693feb09c15daa54949d6ade13734 SHA-1: d77abb61168d6a7235f50e0ba3ecdb187af5e2b9 SHA-256: 663650acb8f5baac8cb9e379f0ad9bcae085f2d898e5995ee6cfad0ed3bfb673
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://gettraff.ru/123?keyword=how+to+leave+a+party+in+minecraft+hypixel In PDF document text
    • https://duxawedi.weebly.com/uploads/1/3/4/4/134477895/4799233.pdfIn PDF document text
    • https://vepovipozo.weebly.com/uploads/1/3/4/4/134472033/1a808eba.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/7069429.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/kusukix-tepokebuzu-kuwiti.pdfIn PDF document text
    • https://rubazepenomul.weebly.com/uploads/1/3/4/3/134324915/rotugusoxo.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/3972043.pdfIn PDF document text
    • https://kudojazejugir.weebly.com/uploads/1/3/4/3/134322101/titiseganinol.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/xifabilejilab/58520208532.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/jomafejisike.pdfIn PDF document text
    • https://s3.amazonaws.com/juzalizuvar/bubble_machine_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/mupakijivuruzim/92384778969.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/mawexog.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/5753074945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04aee994-a1ea-4371-96fe-b736a8e411b8/wujamugixu.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_off00005f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2C 5360 bytes
SHA-256: ab449bbc3d2f71cf9d05d0f4804cc9e4ba3c1b6d3371277591c1409aecf9fb04
font_01_sfnt_off00007160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7160 13540 bytes
SHA-256: a74155cba8b03208c559bc18f5d741bc1f60642709c8b571022aab6636979379

Open this report in the interactive analyzer, or submit your own file for analysis.