Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fca4fe7bcb3bb97…

MALICIOUS

PDF

78.6 KB Created: 2021-02-13 09:47:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 67cf667a573baada50c4dc7f0924d538 SHA-1: c930abc6cdc2f021761d280a6cc79e76e1ed3444 SHA-256: 2fca4fe7bcb3bb976eebfa6b3833edf7ff30cc5491b3a100662291fce01f7f36
94 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically 'https://crophysi.ru/aws?utm_term=angular+datepipe+formats'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious URLs indicates an attempt to lure the user to a harmful site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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.
  • 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://crophysi.ru/aws?utm_term=angular+datepipe+formats In PDF document text
    • http://nout-prokat.website/vbac_birth_plan_template_uk2jma7.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/hbibhar/premium_wordpress_themes_for_blogs.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/0idwoeZ/59123265755.pdfIn PDF document text
    • http://boevoenlp.com/39866071429g1gyz.pdfIn PDF document text
    • https://cdn.sqhk.co/sekopanosesu/bjeGwhc/99250323499.pdfIn PDF document text
    • http://volosaty100.xyz/vivubisasetirexorogarabuj13ql4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453747/normal_6010938e12de2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482858/normal_5fcc1f8f514aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503390/normal_5fd80aebe3e9a.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/hbjakOj/drop_it_meme_template.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/hdt2DZD/wagner_universal_sprayer_control_pro_250r.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/jjjdypP/calculator_online_fractions.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/BjbLFIb/lewex.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/jfsOshf/cheap_cruises_april_2020_all_inclusive.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/heui89L/weather_apps_for_android_phones_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/regovadeje/chest_guidelines_bridging.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCF 5232 bytes
SHA-256: 1e621f1ae341ed05ccf45d468841ed5dfd30b929a26ff2f7314872d59eb97200
font_01_sfnt_off0000ee84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE84 14988 bytes
SHA-256: 0c9ff9fded687a60be064fa404eb40c66023fbc9478f7dd48c93bf9564464b4f
font_02_sfnt_off00011e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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