Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc8fc9ab90bdc63…

MALICIOUS

PDF

83.3 KB Created: 2020-12-17 11:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bbe61d572cd260b27f1ec9f37b643150 SHA-1: beb673e3ba76b0d99267c4f40559390c2fe5e926 SHA-256: ddc8fc9ab90bdc63140026d188c3813282a2a8a9c6c4b7ce40841aeba6c0051c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links for SEO manipulation or traffic redirection. The presence of a malicious URL and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and malicious URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/strik?utm_term=awp+2020+keynote PDF link annotation
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/69beb020cfd08d0.pdfIn PDF document text
    • https://pareropifu.weebly.com/uploads/1/3/4/3/134349273/dd147a.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/muxozuvalubi/the_36_hour_day_barnes_and_noble.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6fd9ea0-740e-4536-ba22-006ce30e4901/longest_running_anime_manga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/885838e3-0409-4db8-97b4-0ba6fc7b021b/xirisuzodudaj.pdfIn PDF document text
    • https://s3.amazonaws.com/vibove/1742297754.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/52091528656.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/93437253608.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5abf4ec917750a3f83921/t/5fc9b667196a600d3c2fb365/1607054951843/73754583000.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/zijosadod.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/luxembourg_travel_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07d836b97992eb55a0df7/t/5fc15b89f8cdb769c6165071/1606507401297/heat_n_glo_6000_dvt_manual.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_off00010865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10865 4820 bytes
SHA-256: 90bf64dc0d8ad8f9fae2e1893d9c285191d4b98fa4bb85cd9d985a404c014e83
font_01_sfnt_off0001190a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190A 12116 bytes
SHA-256: 2bf7c2e21bc500e3e3b24d7e29b4306d16945c1cf7596dc34dd41d9152924a23

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