Malicious PDF — malware analysis report

Static analysis result for SHA-256 385418cb5c79a269…

MALICIOUS

PDF

64.1 KB Created: 2021-02-20 13:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c0c78c0a6268abcc931f84ca4f0de86f SHA-1: 265ac7c9ef9004a2140764596451e6aa407fe858 SHA-256: 385418cb5c79a2695bc1bd07839785ebf8d038a3a2dc0da132faacc533d3d8f0
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=how+to+hack+asphalt+8+android+lucky+patcher PDF link annotation
    • http://xopidufixa.iblogger.org/carestream_dicom_viewer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427523/normal_5fea021c41c0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409098/normal_5fdc06db8254c.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/6748211.pdfIn PDF document text
    • http://akb54.ru/77710684632z8eyd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483365/normal_6013372023818.pdfIn PDF document text
    • https://bugomalaked.weebly.com/uploads/1/3/5/3/135324661/lojaniwo_pelepukaze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447460/normal_5fedff1964058.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mewozegi.epizy.com/new_fairy_tales_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/rilajuditedatusemitogemij.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/vopadeviremafogufibag.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/aziz_ansari_modern_romance.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/clariant_annual_report_2016.pdfIn PDF document text
    • http://suvuxugoboboju.rf.gd/technical_project_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/carrier_air_v_heat_pump_manual.pdfIn PDF document text
    • http://rovuwuruw.epizy.com/51527274315.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/69151161369.pdfIn PDF document text
    • http://botibaxar.rf.gd/christian_songs_telugu_videos.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_off0000bc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9C 5576 bytes
SHA-256: cf8a824ba2a3273d326d432e15ca5e892fce6d72da5815f35bfbb9a995f3165a
font_01_sfnt_off0000cf9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9C 10556 bytes
SHA-256: 61d988f651aef5076bbb98485471298d8f5af4dc7ad8b29cd82ff5c0fec021b1