Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1506ea7e7f3dcd…

MALICIOUS

PDF

85.4 KB Created: 2021-02-10 04:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4646fee3eac0e830dc2a68bc908c07f5 SHA-1: 81197ac8d1c34de31e20b2c9e90f820c8f655050 SHA-256: 0e1506ea7e7f3dcda8e288706df0d3b6cf936f161962347e803e9c5d6c735e9b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified as a link farm. This suggests a phishing or SEO manipulation tactic, aiming to direct users to potentially malicious or misleading content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wb?keyword=pavitra%20bandham%20songs%20ing%20come PDF link annotation
    • https://zivukiwele.weebly.com/uploads/1/3/4/7/134749768/3994364.pdfIn PDF document text
    • https://wurivebufe.weebly.com/uploads/1/3/0/8/130874680/laponavusipaka.pdfIn PDF document text
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/pirituxagivukox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_600d6b76f07e1.pdfIn PDF document text
    • http://1eyvgo.xyz/free_wheel_of_life_worksheetrdmfx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423155/normal_6010588424fc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376629/normal_601958495b6e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412763/normal_5fdebaff2270e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_5fd6411f5b648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_600c40429e645.pdfIn PDF document text
    • https://relotevifinedu.weebly.com/uploads/1/3/2/6/132683264/labamozugegudo_fuvizanep_momidutux_binabipatule.pdfIn PDF document text
    • https://bokesavuxi.weebly.com/uploads/1/3/0/9/130968985/wenavabatufobar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418991/normal_602333912660f.pdfIn PDF document text
    • http://vnds-v.website/xulagekoramiluw1zolt.pdfIn PDF document text
    • http://bioforcecolumbia.site/4267175488mk5ft.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/remozowitenisub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460055/normal_5fe07e774ff9a.pdfIn PDF document text
    • http://presentinsta.site/burberry_employee_dress_code3v4g3.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
    • http://mizujem.epizy.com/68689588017.pdfIn PDF document text
    • http://witopovuketoj.epizy.com/xopikurewabanap.pdfIn PDF document text
    • http://kodireso.epizy.com/dokozugefemixesakusa.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_off00010358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10358 5312 bytes
SHA-256: 56ad4e140a66251535ba4977a9a7dae12545c5b47a11bd5ae7e23ef9faf04135
font_01_sfnt_off0001152a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152A 10824 bytes
SHA-256: 3a6d712d12932f5d158e07158d9757a7ead817dee0165fe321c7a8fb9ee96740
font_02_sfnt_off00013a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A07 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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