Malicious PDF — malware analysis report

Static analysis result for SHA-256 292fd8da26eeb2ea…

MALICIOUS

PDF

45.0 KB Created: 2020-11-05 09:40:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b2857c6db0d4bc534526c7999b311bda SHA-1: 91ae969b5c51fe930fd0ff0adf5a93dc87dba266 SHA-256: 292fd8da26eeb2eab455828f0ed5845b069ca5a6f4b5882d02cb98f3a587d0a0
170 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one identified as a malicious redirector. The document body, though partially corrupted, contains text related to a 'google educator certification exam' and a malicious URL, suggesting a phishing or scam lure. The presence of many external PDF links also indicates a link farm, likely used to distribute malicious content or traffic.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=pass+google+educator+certification+exam In PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/61d4029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444643/normal_5fa01faa2ccaf.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/3900939.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_5f98849e5ef3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f99f8ec9e1df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5f90523065163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404964/normal_5fa21f8034dd5.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/1/0266/7449/5663/files/lubert_stryer_biochemistry_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1391/2222/files/los_verdes_golf_course_wedding_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18eebcce-6036-4e49-b28c-0b078807f345/comparing_quantities_class_7_workshe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971c4bc2-aaa0-48fb-8dc9-808740a8e9b6/dark_cloud_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12816304-f1a2-4383-9a85-49168259f559/android_clup_clash_of_clans_hile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e62ba781-aeb2-457b-8896-270264d24b28/85440993327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4fe829b-e7c1-479c-bf37-192b3a2dcf01/mivalubemuriziwewixatob.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_off00006eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEB 5412 bytes
SHA-256: de852022e2afa0b260d7ba1b93a463c741ca82ca08fb226624019e21eab2f799
font_01_sfnt_off00008143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8143 11100 bytes
SHA-256: 0524ab2b24c035288c889b4a049d0cca4793f702f318c36a71580a83b61fe9cb

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