Malicious PDF — malware analysis report

Static analysis result for SHA-256 21301c32db32d3fc…

MALICIOUS

PDF

68.0 KB Created: 2020-12-05 23:05:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 65a0b7306209fad1f570e2bbf5a1eb0b SHA-1: c979a271cf12d2fea5d44cf44ddb6aa3864be69e SHA-256: 21301c32db32d3fce11fbed967eea8f8a791dc64ac26f0bc61730a182c9a3e5e
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to external, potentially harmful, sites.

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://gettraff.ru/aws?utm_term=bigfoot+systems+footing+forms In PDF document text
    • https://nunevebola.weebly.com/uploads/1/3/4/8/134846747/razopiked-tulam.pdfIn PDF document text
    • https://doxorovovo.weebly.com/uploads/1/3/4/4/134479089/9527018.pdfIn PDF document text
    • https://xoxigukot.weebly.com/uploads/1/3/4/8/134861038/1873c0a1b68.pdfIn PDF document text
    • https://famatogovux.weebly.com/uploads/1/3/4/6/134614416/1248446.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/2406058.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/5fc0d650403f5353fd956949/t/5fc1e74e5147b1480478084d/1606543184292/elements_in_the_human_body_worksheet_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e99fa13a450babf41659/t/5fc146dbf8cdb769c6127c66/1606502110101/90491318887.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c9b1a5bc066edfa528b7/t/5fc188762dd96f5918294ee2/1606518903447/ronatonalamalunep.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf3442dd96f5918b38752/1606284100378/fulewuvodojusaluzofojuje.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfd1c9d7936484054a562/1606286621538/broken_moon_freeport_tx.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/iowa_doc_inmate_finder.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb205e8e827d4288adb3/t/5fc16896f3de5e49b5998a7c/1606510743223/find_fxx_y_calculator.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd008c14dfd36feeb1b6e/t/5fc0f96808845d0924ad0764/1606482280233/how_to_hack_vlogger_go_viral_ios.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc374892bbd74065816c63e/t/5fc5555318e72e5fdb89296d/1606767956682/47774113877.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_off0000ca82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA82 4996 bytes
SHA-256: 4317469120ee0f044df9a439ff7088f4da88d271b48986a2f19348d7e2acb8b2
font_01_sfnt_off0000db86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB86 11148 bytes
SHA-256: 493a55f7248cb98166c9ee439f4c0fbd5afd7a049cf36cc225294713b78ae489

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