Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10e98cd2cc32783…

MALICIOUS

PDF

77.1 KB Created: 2021-05-20 03:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8ee2561126d05b0f3c228748abb7501 SHA-1: baf1d1701e9e25e6d8d14e34928b9162fac7baa0 SHA-256: c10e98cd2cc32783ba1d1c8cdc7ee6d3d404d5ca4e412755f2c28729ef39282b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to PDF files hosted on Weebly and other platforms, suggesting a link farm designed to distribute malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. While no scripts were explicitly extracted, the PDF structure and the nature of the links indicate an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://kuzutuzo.ru/strik?utm_term=bahubali+2+telugu+movie+hd+free+download
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/6706125.pdf
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/gigafep.pdf
    • https://lumosezuto.weebly.com/uploads/1/3/4/4/134499790/dugixavavipezejinur.pdf
    • https://cdn-cms.f-static.net/uploads/4413370/normal_60282ec0d1487.pdf
    • https://cdn-cms.f-static.net/uploads/4500887/normal_604cbf5392102.pdf
    • https://cdn-cms.f-static.net/uploads/4371812/normal_605982e2752b3.pdf
    • https://xoxebugifujame.weebly.com/uploads/1/3/4/4/134478015/631572.pdf
    • https://cdn-cms.f-static.net/uploads/4408875/normal_6017040dd8754.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gurafoga/50871516599.pdf
    • https://uploads.strikinglycdn.com/files/61d5d7a7-0354-4206-bc96-c70dd0958d89/22409369775.pdf
    • https://s3.amazonaws.com/rizijubovapuk/17021450104.pdf
    • https://s3.amazonaws.com/tufujifinobiro/41812224121.pdf
    • https://s3.amazonaws.com/gavexilatuvitaz/kazuduvatoluno.pdf
    • https://s3.amazonaws.com/pilazi/nuzujape.pdf
    • https://s3.amazonaws.com/zisulamisozoto/guidepoint_graduate_salary.pdf
    • https://uploads.strikinglycdn.com/files/1196178e-4bf1-416d-b4af-b78cc05c3479/how_to_pass_nyc_permit_test.pdf
    • https://s3.amazonaws.com/tesapibebujep/tewixaluxajutib.pdf
    • https://uploads.strikinglycdn.com/files/37c1d42f-654d-4881-9e04-ed13a232601c/xifekexogerapezasapaxe.pdf
    • https://uploads.strikinglycdn.com/files/62d541ac-1082-408c-a54c-947b99fd93cd/57525326245.pdf
    • https://s3.amazonaws.com/tometubufimopim/18221707647.pdf
    • https://s3.amazonaws.com/wemazun/fila_disruptor_2_platform.pdf
    • https://s3.amazonaws.com/sizadagazagaj/makro_food_catalogue.pdf
    • https://s3.amazonaws.com/zukogi/11672839903.pdf
    • https://uploads.strikinglycdn.com/files/0c9d1938-5865-4550-8a30-ddc2964c5af8/woxado.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef21.bin
b1c9c5384d855090a93e4a0e91ce345f6d552bc8d4c7a349caf9d9b15949cada
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF21 5616 bytes
font_01_sfnt_off00010229.bin
22c9a1ea6c4fae76db5d7abee8414651eae9de027e61e3d8a4d748bbe75af462
pdf-font-stream PDF embedded font (sfnt) at offset 0x10229 10820 bytes