Malicious PDF — malware analysis report

Static analysis result for SHA-256 c641a67559b517d7…

MALICIOUS

PDF

70.4 KB Created: 2020-12-16 04:11:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: df5f9e9c9213368c670d384b69626680 SHA-1: 9646fed2c3e0d221a70566fd6c4e8eb50b2b8a92 SHA-256: c641a67559b517d70ed706e5dad4ea97d60a17fdc06d80533179ca714af85f27
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were extracted, the presence of malicious links and the PDF structure suggest an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffmen.ru/123?utm_term=droid+maxx+user+manual In PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/risareli.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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4f533c6ccf69f354f888/1606373203889/how_old_are_you_in_4th_grade_in_usa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8dcc6229360ecad579d/t/5fd06b71a9460057587dd68b/1607494521598/53215939945.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc794aa849d1727bc133313/t/5fc9468c59093a79be16d123/1607026316399/erase_data_from_hard_drive_windows_7.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59cd3bd14ff0dd2bcaadb/t/5fc73dc793ad1a48121815f2/1606893000218/43200015264.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce8b151ad4c9596a3fd8db/t/5fd6344bab1a676c7287f31e/1607873613064/chhota_bheem_movie_all.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc170e692c50b1a1e7b565d/t/5fcb291164036b614388d0ee/1607149842058/kirozigovovawatajew.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe20fb9ee0f32b871cad76/1606295804319/41995818235.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6b9d1c43b171198859c62/t/5fc7e6f53e96977c29cb6bb1/1606936322674/vuzikiwiniwemazuf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65351ab79f442f24e7764/t/5fcd5bb5eb18547f4b95d8ef/1607293878690/wotufofutala.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0052111f6a4198480c96b/t/5fc5b60861e25426e1fd88d6/1606792713587/tejumuzif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/277dbe59-3e44-4fb1-b521-46637ca1dd86/e5s_ramuh_guide_ffbe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdef2c3485235c868a5655/1606283053290/snowflakes_falling_all_over_town.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_off0000ca47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA47 4840 bytes
SHA-256: 40cadf2334b0e9ed8d95098a429a834933989cb4210ad3fc84b52f5263483761
font_01_sfnt_off0000da9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9A 10732 bytes
SHA-256: 2f2a9b9142328134876c252a204ce52561004ddb06c8846c88cd34c8a26ac8fd
font_02_sfnt_off0000ff13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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