Malicious PDF — malware analysis report

Static analysis result for SHA-256 9635873703a042a1…

MALICIOUS

PDF

76.5 KB Created: 2021-01-20 07:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 060dc50e6dfb7fcc5a8f9c2ab1252ee9 SHA-1: 30d0529d146d57215391404b08d11734b8b3a519 SHA-256: 9635873703a042a12c67a292e86113f3c7110abac6b7c7e34d783ae24202bad7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/wb?keyword=encyclopedia%20brown%20boy%20detective'. This URL is likely used to lure victims into a phishing scheme or download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/wb?keyword=encyclopedia%20brown%20boy%20detective In PDF document text
    • https://static.s123-cdn-static.com/uploads/4387040/normal_5ffc768283465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5fb4011855036.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5fcb65c065692.pdfIn PDF document text
    • https://wikiredapitij.weebly.com/uploads/1/3/2/7/132712416/69aaaa80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473047/normal_5fbcd00b00d93.pdfIn PDF document text
    • https://tanatomunedasov.weebly.com/uploads/1/3/5/3/135325499/b35379a0793fe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379029/normal_5f9418596068c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408594/normal_5fdf6e189bcc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5fdb29dd95f4e.pdfIn PDF document text
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/084ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368731/normal_5fefa0e3931a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lomogas/factoring_the_difference_of_two_squares_worksheet_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/23646531305.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/feranuw.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/kavuverilevonozimazu.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/unilorin_admission_second_list.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_off0000ed08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 5240 bytes
SHA-256: 0eb887cddca708a923395736d6f6d2395e113fa077e01704d8dbc4eee7b49b47
font_01_sfnt_off0000ff07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF07 11256 bytes
SHA-256: dbacd4a8bf8f26db3701f8e9eca9d252ac1bfe2c1013dbb681c1ac4a70e1e998

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