Malicious PDF — malware analysis report

Static analysis result for SHA-256 461b9cfcc5b81ce6…

MALICIOUS

PDF

82.5 KB Created: 2020-12-04 21:53:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ce09889614afba2d49e2afbb3e8ce092 SHA-1: 1bbad3c9eaf8cd979cf3063b1ff1f2a2227e0838 SHA-256: 461b9cfcc5b81ce6331e10da4e42cd13858e426f9710122bf30dfc504869c905
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=manual+alignment+serdang In PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/rosoxuputavexexofufe.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/6711581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_5f8acce952b8b.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/5fbce344be7cfc36344e8aaf/t/5fbd2cd16970b4707d0b9a26/1606233298753/the_power_of_nice.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5618dd26ff1194f91dbd2/t/5fc60e26173fb5383b72e1bf/1606815270906/how_to_insert_a_gif_into_google_slides.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/abel_danger_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/spironolactone_100_mg_coupon.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/kopabuginades.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0e293fdc31513a11ea9b/1606225451541/24400701760.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/notoparovugot.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/protein_shake_nutrition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28364c89e1c4b8fc8bd46/t/5fc3b2bc145a8629dc2189c3/1606660796865/state_of_hawaii_bureau_of_conveyances.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/10609751428.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0012c12facd59cea80d2a/t/5fc21950173fb5383bea467d/1606555985745/78176312172.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED21 5148 bytes
SHA-256: 1687507a558f8c79ad065ac8d234b3ab759c54e810d4526c6080492cd0a2ff98
font_01_sfnt_off0000fe98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE98 11568 bytes
SHA-256: ca55fbe4c7062b545d24852e0b075c00afcc2ae7b287ac6d83c25d56352407ec
font_02_sfnt_off00012604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12604 16340 bytes
SHA-256: c364498d4f50d527c920c17f113f5ee65037b439c9ed2483fef40b73ea7d063f

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