Malicious PDF — malware analysis report

Static analysis result for SHA-256 52d27d01328e04f0…

MALICIOUS

PDF

67.8 KB Created: 2020-11-24 00:56:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2d5256e40a872d6d1c2aafdca8692ea0 SHA-1: b4ded5411f2a26d9875e4fe0c5ffac6b39b1cbcc SHA-256: 52d27d01328e04f01ca327593e1d969454947e90646139e70a8c650a5a768e35
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, likely as part of a phishing or scam campaign. The document body, though heavily obfuscated, contains text related to song downloads, suggesting a lure to attract users to click the malicious link. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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?utm_term=samsaram+adhu+minsaram+songs+free+download+mp3 In PDF document text
    • https://jidugurulepapol.weebly.com/uploads/1/3/4/3/134310086/xudadokilisadim.pdfIn PDF document text
    • https://bizepusenovub.weebly.com/uploads/1/3/4/5/134509919/2fc5c8.pdfIn PDF document text
    • https://femimujuzo.weebly.com/uploads/1/3/4/6/134640298/d3a7f.pdfIn PDF document text
    • https://dijumigomeruke.weebly.com/uploads/1/3/4/3/134309809/zokedetazazedis.pdfIn PDF document text
    • https://seforurusux.weebly.com/uploads/1/3/4/1/134131879/dinuduw-pixawani-kefotavalodi.pdfIn PDF document text
    • https://zavewixesareput.weebly.com/uploads/1/3/4/8/134855174/4118163.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/simujix/checkbox_reactive_forms_angular_6.pdfIn PDF document text
    • https://s3.amazonaws.com/newopetusam/cal_dietz_books.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/rapenaxopoxexuwixale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/562e0164-9fa5-405b-bbf5-55a088213e41/17303812438.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/group_7a_names_periodic_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d87b9db2-e551-43a5-9748-0c38874a3b2d/black_friday_mechanics_tool_set.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/vinyl_record_dimensions_album.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_off0000ca5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5D 5816 bytes
SHA-256: 6af124309256dc990adce57cfe5ec54a360c44981eb2b3296d8ac2e531090ba6
font_01_sfnt_off0000de14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE14 10860 bytes
SHA-256: a2e295bfdd87f84dc8029e535a013c7c338bce1e311193323177e66b39f45456

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