Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0483f7af65feb9f…

MALICIOUS

PDF

73.5 KB Created: 2021-02-06 07:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c7e1283fab86d569d16d908ee0115480 SHA-1: 5b0e40a0faff5354f63b0d521a7717bb4aea206d SHA-256: e0483f7af65feb9f0c9f71f143c0f2ed97972524aeb162031ce5c8fba228a291
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a significant number of external links, identified as a PDF link farm, pointing to various domains. This behavior, combined with ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests a malicious intent to redirect users to potentially harmful sites. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://baarspo.ru/123?utm_term=aladdin+2019+release+date+australia PDF link annotation
    • http://zoom-omsk.ru/volo_s_guide_to_monsters_erratawfut4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401505/normal_600592797d1b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408343/normal_601b0d9d6f541.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/vuvikizugiki.pdfIn PDF document text
    • http://sallles.ru/champak_story_book_in_hindi_full_freekswcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378619/normal_5fcbe2da5b013.pdfIn PDF document text
    • https://lowunipuso.weebly.com/uploads/1/3/1/4/131453219/0552c5.pdfIn PDF document text
    • http://summ-ita.space/9828985017496zdh.pdfIn PDF document text
    • http://hookup682.site/formule_simple_chute_de_tensionu1fhi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497638/normal_5ff632e2da09c.pdfIn PDF document text
    • http://austritkfa.com/tusibenogizawodobemepodw7xud.pdfIn PDF document text
    • https://xidujodoj.weebly.com/uploads/1/3/1/0/131071067/8167031.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452595/normal_5ff0a5c486985.pdfIn PDF document text
    • https://wekexobesunolo.weebly.com/uploads/1/3/0/7/130739288/d3310a.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/woberiz/74922247764.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/91611444658.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/esl_irregular_verbs_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/70719308910.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/cisco_webex_free_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/46902352179.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/opwdd_incident_reporting_training.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/denim_size_guide_uk.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_off0000e120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE120 5288 bytes
SHA-256: 234e0a3e7b827730600a52e56695bb4257d4ea62a373be6700219f17bf01502c
font_01_sfnt_off0000f32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32A 10916 bytes
SHA-256: f51f30495e4ebf5ca436fd724b636b51745343344438aea5a3be125a2661e2a0

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