Malicious PDF — malware analysis report

Static analysis result for SHA-256 793d419c8ce67f63…

MALICIOUS

PDF

43.1 KB Created: 2020-10-11 13:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 891f2406dc89942a772a10fdf96cd71b SHA-1: 623bb3c252869a5793288da21fc517bc603fbea4 SHA-256: 793d419c8ce67f631e9e2e11e95ba3f8d7c8fa464f4b067f31245c8ccb57b01a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the query 'What is jpanel' and the URL 'https://cctraff.ru/strik?keyword=what+is+jpanel', suggesting a lure to a malicious site. The presence of a link farm further supports the intent to drive traffic to potentially malicious content.

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://cctraff.ru/strik?keyword=what+is+jpanel In PDF document text
    • http://files.wonderfull.blog/uploads/1/3/0/7/130739678/bidiga.pdfIn PDF document text
    • http://xolaluk.marksmadmenband.com/uploads/1/3/2/6/132695629/xedow-tijitugok-xupizudufasi.pdfIn PDF document text
    • http://tuzuw.zeinalameddinephotography.com/uploads/1/3/1/3/131379550/1839355.pdfIn PDF document text
    • http://files.dphsart.org/uploads/1/3/0/7/130776407/6e9e02b5.pdfIn PDF document text
    • http://files.lifesshades.com/uploads/1/3/2/3/132302754/2690702.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/1/0432/7584/5792/files/nekibifisobanibiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/royal_envoy_campaign_for_the_crown_level_59.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0298/2310/files/69088929311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/20090592866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6092/8405/files/senorita_g_idle_roblox_id.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a050b2-d9bf-4e69-8570-5e371df9cec8/lexufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b13aa06a-ac12-4263-92bb-090393efdc98/nemoforizazizemijedofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf334aa-d1b3-481b-afb9-5f61c00af498/towedipobikegigaraw.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_off00006477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6477 4900 bytes
SHA-256: d0029f76a680da275b67ce92565d44583f0dbf06a55df79c59961240a254cb8d
font_01_sfnt_off0000752f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x752F 13320 bytes
SHA-256: e6d2f210e09dcf60ae70932ba69b0eab0f3e07e0d51eac283c7ce91cc526d0bc

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