Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd2458ff0207055…

MALICIOUS

PDF

70.2 KB Created: 2020-12-21 17:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 71f37eeaa10e01806636dd5ad36526be SHA-1: bae6ca3aaba82263fcfcffa9382a4b87a923e41b SHA-256: edd2458ff020705564bcc6d82d4ac907ddc293846286fed4d76809d6451a3a9d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one URL pointing to a potentially malicious domain. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=democratic+management+styles+definition PDF link annotation
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/68fee7a133cbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376600/normal_5f8fd209cfaa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f9c7777ebebe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420767/normal_5fde6159c0ced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_5f90cc24c0d82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_5f8ff5601eeea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wefemabeni/pottery_barn_crib_sheets_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/cisco_packet_tracer_7_32bit_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/63786616065.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/macromedia_freehand_10_free_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/hsslive_maths_question_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/distance_time_graph_practice_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/sotupo.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/18368562389.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64D 5232 bytes
SHA-256: ae7e6fc5d8c4bd7f109bbc2e5089a767e0044c73c437ef58f2b03d6038dd32e2
font_01_sfnt_off0000d807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD807 11124 bytes
SHA-256: 92026952ec7dbc299fcb0d16fa1720bba3f5acfcd2c8a538bf96060e8aec2595
font_02_sfnt_off0000fd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD99 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.