Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c09de14560a78f…

MALICIOUS

PDF

34.4 KB Created: 2020-09-30 13:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b112e1e10d1d766d096257e262709110 SHA-1: 324d903bbb801c257cf4b341fbcf4becc058c9b2 SHA-256: c1c09de14560a78f5ec16ef97cc57ed3d093fed0377d68f28048064e1d33676f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of numerous links suggests an attempt to drive traffic to malicious sites, potentially for phishing or SEO spam, aligning with spearphishing attachment tactics.

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=clinical+anesthesia+morgan+pdf In PDF document text
    • https://site-1037218.mozfiles.com/files/1037218/78125558633.pdfIn PDF document text
    • https://site-1036686.mozfiles.com/files/1036686/21361671040.pdfIn PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/83721854924.pdfIn PDF document text
    • https://site-1037864.mozfiles.com/files/1037864/15733502416.pdfIn PDF document text
    • http://files.jenniferroseheath.com/uploads/1/3/0/7/130775822/moxopivobibuno-zulusa.pdfIn PDF document text
    • http://files.findingancestorsmadeeasy.com/uploads/1/3/0/9/130969834/tupijemokamigi-dogagojujoniza-patitiwakudevu-wigebule.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/1/0439/7583/5806/files/nivuxafixasijedaketozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/spatial_analysis_methods_of_road_traffic_collisions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0794/0520/files/adobe_acrobat_dc_trial_version_free.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_off00004a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A48 5476 bytes
SHA-256: 0cb84212db6b1e2e816fca6de430c03679f7525de125064495f85c040ac5f1b5
font_01_sfnt_off00005cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB5 9612 bytes
SHA-256: f962cc80e5bb73bf055951de6212e0e77b5133f6fa64088fb906d4f69637afcb