Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac34a24f35eae0fe…

MALICIOUS

PDF

86.3 KB Created: 2021-02-22 00:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c7a4f025a61016fc6dbbe005c16e08ca SHA-1: 7882872c791537617511b762e4172ef923ae2404 SHA-256: ac34a24f35eae0fee8ac0f6d84db1fa0c56f5ea5078102a35ee98ed620f79b40
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, many of which point to SEO-optimized PDF files, suggesting a link farm or phishing attempt. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=lawn-boy+320r+snowblower+parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468534/normal_600663ba0c5a9.pdfIn PDF document text
    • http://tuligofabuwisa.22web.org/ardaas_movie_song_free.pdfIn PDF document text
    • https://zojezuma.weebly.com/uploads/1/3/1/3/131382028/bd865.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369665/normal_5fdfb08630618.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470221/normal_5fee381e6f2f8.pdfIn PDF document text
    • http://yblda.fun/business_studies_igcse_answers8igb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409405/normal_5fe2449531a33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409394/normal_5fcafb35275b1.pdfIn PDF document text
    • http://thefortykuti.com/vodadisikakutazezigiyyae0.pdfIn PDF document text
    • http://repovor.22web.org/rafenujuf.pdfIn PDF document text
    • https://womovenurobo.weebly.com/uploads/1/3/1/8/131872055/5797888.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496826/normal_600862450e7be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413567/normal_6002fac82870e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461202/normal_5fdf47d7b9fd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_5fd6d9d75949b.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/goviwigax/cce_ka_full_form_kya_hoga.pdfIn PDF document text
    • http://lalemifeluruka.epizy.com/nofidupukelafogalim.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/bigo_live_apk_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/68094094240.pdfIn PDF document text
    • http://fonajuwowo.epizy.com/dragalia_lost_dragon_gifts_guide.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_off00011257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11257 5560 bytes
SHA-256: 38945320586729a977ee368623517fc76396835e3a8311bea4b40805110b5c0a
font_01_sfnt_off00012568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12568 10904 bytes
SHA-256: 77e412f9df41cd87b84f5846f4c2b53427a80c785a5c979eca8a94436aa8e9fe

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