Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f04547de61740d…

MALICIOUS

PDF

84.2 KB Created: 2020-12-17 15:31:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fb3d0cd260b0a747f58f04bd0deb736f SHA-1: 2c0edb89f457a3f93a41bec473f1a2fe4b980d2b SHA-256: 08f04547de61740db376640aeeea53e29f0ceb155cfd9fe11c5087bfc14552f4
104 Risk Score

Malware Insights

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

The PDF document is identified as malicious due to its use of a link farm to obscure a malicious URL, disguised as a service manual. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with the primary malicious URL being 'https://traffnew.ru/strik?utm_term=jcb+506b+service+manual'. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect the user to a malicious site for further exploitation, likely involving a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/strik?utm_term=jcb+506b+service+manual PDF link annotation
    • https://julavatevimire.weebly.com/uploads/1/3/4/6/134669339/natoka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374380/normal_5f9dc2e7eea22.pdfIn PDF document text
    • https://vekeliludodim.weebly.com/uploads/1/3/4/7/134745250/lifoladamogegemad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493209/normal_5fad7cb9156ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1366588c99b6d37a92994/t/5fc55c756457125654ef3e7b/1606769782098/27803268798.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/brand_identity_guidelines_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/bc_fishing_guide_license.pdfIn PDF document text
    • https://s3.amazonaws.com/moxekibupuru/cse_8b_ucsd_soosai.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/clinical_pharmacy_therapeutics_roger_walker.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc281d924b06a7eb3097406/t/5fcf6d0c69d6d06d5540f118/1607429391914/2000s_alternative_rock_music_videos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ac2eabaecd331842ccaa/t/5fc8e02746ef2e08cbc0e627/1607000103323/puppp_rash_only_on_arms.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd15b947f0db06af82c3a5/1606227385777/famous_landscape_photographers_uk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceb8d2a1b4d771ad263c7d/t/5fd08bc96cbf29106bff24b7/1607502795727/basic_reversible_logic_gates.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/31890884428.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc528f2abaecd33183df1a5/t/5fce4687662d5e24e0d06d05/1607353991699/exos_heroes_character_designer.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/safupefepozox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcec2512a3d2561f5f73f61/t/5fcfb3183fa051062b53ad67/1607447320843/fast_drop_in_blood_pressure.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_off00010b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B33 5552 bytes
SHA-256: e343fd4ea99a70ece78250f540d5cc74d0343217b1f8844526f6a363b8774207
font_01_sfnt_off00011e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E08 11272 bytes
SHA-256: fb5b85058ee049fe3af5cc1a581afecbf11bb9b7568257c5fba541a8095c5362

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