Malicious PDF — malware analysis report

Static analysis result for SHA-256 7048a3b405fea200…

MALICIOUS

PDF

75.0 KB Created: 2021-02-12 05:12:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: bb35b9cd20ae3ec9aaec11df1f51e450 SHA-1: 2963f11b373e5c01a4e538b2eba952f486598cba SHA-256: 7048a3b405fea200a4e5330efab2055b54de8f92ac10fd6b96059d6536ccbbaf
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=chelation%20weathering%20pdf In PDF document text
    • http://stnold.com/zajafinuvw9aor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420765/normal_601de66c4a271.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381759/normal_5fcce848c0c30.pdfIn PDF document text
    • https://funesovikigaje.weebly.com/uploads/1/3/0/7/130740183/betesawulawujez.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/fhaoZe6/xogetasajiv.pdfIn PDF document text
    • https://poteluteko.weebly.com/uploads/1/3/1/1/131164474/ximole.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470389/normal_600075825cf3d.pdfIn PDF document text
    • http://yildirimotobursa.com/historia_de_la_contabilidad_electronica_en_mexicov9qks.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/2m9fiha/.pdfIn PDF document text
    • https://dugigoje.weebly.com/uploads/1/3/4/7/134754128/b896730.pdfIn PDF document text
    • http://andyhong.blog/6514020708f1l96.pdfIn PDF document text
    • https://cdn.sqhk.co/faruzikako/VigEYGB/77103066465.pdfIn PDF document text
    • https://cdn.sqhk.co/zexoribuj/hgichgq/fill_in_3d_online_free_design_download.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/fujadabez/demaboperovitawopidelanu.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/71026980837.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/bendix_brake_pads.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/curtain_wall_construction.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/black_background_wallpaper_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/57428441358.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/422491008.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_off0000ea08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA08 5124 bytes
SHA-256: d0a46aed8fc36a14d46640c0aa1602f236776f80f35b476189cb7d230d3cb3da
font_01_sfnt_off0000fb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB84 10224 bytes
SHA-256: f00e015bb8bbe67b1e55cd3f88ff698146bb8ec79c8b6c2072c323eb36524797

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