Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4539e11b082a74…

MALICIOUS

PDF

81.8 KB Created: 2021-03-14 07:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fe3c77bb2b5ac260c296daeb3cfe532 SHA-1: 2f4222cbc080f0bc097072f05fbeb93f22ecec44 SHA-256: cf4539e11b082a74d0db4e916805fc38e6b8dbc7ba00027bf505911485c494f5
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=homer+city+pa+population
    • http://leziwazedo.mypressonline.com/deroru.pdf
    • https://cdn-cms.f-static.net/uploads/4374851/normal_602947e04073f.pdf
    • http://hopecommunitynaz.com/nuredumajofafe7doyu.pdf
    • http://jonebukusopovet.mygamesonline.org/37109146034.pdf
    • http://fruct.space/19894txqz.pdf
    • https://static.s123-cdn-static.com/uploads/4369336/normal_5ffd0686c1223.pdf
    • https://jipunusib.weebly.com/uploads/1/3/0/8/130813609/xifijofifewukomixu.pdf
    • http://detozube.scienceontheweb.net/how_to_change_husqvarna_chain.pdf
    • http://limons.space/unexpected_eof_golang_templatea685c.pdf
    • http://xajavawinereko.mywebcommunity.org/88068537985.pdf
    • http://melidagerukebel.sportsontheweb.net/the_5_minute_journal_barnes_and_noble.pdf
    • https://rudanivaxaf.weebly.com/uploads/1/3/4/4/134497940/46200ea811a1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kafises/sopabika.pdf
    • https://s3.amazonaws.com/bupesejirijejus/boxojisuzu.pdf
    • https://s3.amazonaws.com/bezorito/conditional_probability_distribution_example_problems_and_solutions.pdf
    • http://nevabaza.atwebpages.com/article_about_child_and_adolescent_development.pdf
    • http://gurabagoderes.atwebpages.com/72052026355.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_off00010439.bin
092bc96743771fa808f96363912c3d7301cdc2d63d97d8d6c8a084af673b31e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10439 4964 bytes
font_01_sfnt_off0001150f.bin
3f1a96aed9e09385cf2122d36df6043c78794a7e965bdb27675585c07b091f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1150F 10940 bytes

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