Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d58295fc22d0f1…

MALICIOUS

PDF

74.1 KB Created: 2021-03-15 04:15:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 54edda631f431fc2b49efce8f8fc4c6a SHA-1: c27377d169e15eb18b9ba7e58b654a8c0a0e3257 SHA-256: 22d58295fc22d0f10e4b646ea369eb846d0d897c38cdeb1d3102e758f8f2f5dc
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dugedepap.ru/123?utm_term=kindle+reader+for+windows+7+free PDF link annotation
    • https://dowogejur.weebly.com/uploads/1/3/5/9/135992185/tewojek_jepow_lejatupujitiso_lodafafajo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481417/normal_5ff7682a17263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385417/normal_603ab7723d5b4.pdfIn PDF document text
    • https://wutotopuwa.weebly.com/uploads/1/3/4/4/134464713/6079318.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/72842629768b7rwv.pdfIn PDF document text
    • http://matrixbicycles.com/anthony_de_mello_awareness_free422xy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417645/normal_601a1ec24a8e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444102/normal_5ffea4f043146.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465559/normal_5fffbfc942a54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479445/normal_6006a698c64ec.pdfIn PDF document text
    • https://kitijudaxedefex.weebly.com/uploads/1/3/5/3/135350735/3393131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480383/normal_6034960ec903d.pdfIn PDF document text
    • http://covid-19online.site/30949027534vxjg2.pdfIn PDF document text
    • https://giburonolunege.weebly.com/uploads/1/3/1/4/131406036/kurepitoni_lesojax_numitepuwigijo_kiwijiv.pdfIn PDF document text
    • https://fufefofixikulo.weebly.com/uploads/1/3/1/1/131163927/kejutiv.pdfIn PDF document text
    • http://usacreditreport.info/how_many_chapters_are_in_fnaf_the_silver_eyesxt4d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_600fe4db73b89.pdfIn PDF document text
    • http://rubeatyshop.xyz/how_much_do_steel_trusses_costibfuj.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/pobixedele/lakarezewaj.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/open_source_search_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/34135185689.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/canon_speedlite_600ex_ii-rt_flashgun.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/bmp_24_bit_header_format.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_off0000e604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE604 5044 bytes
SHA-256: 17064f714db768f954af4fd3f1c74652196cb4ae84a0cb2618bf2034eeb08eda
font_01_sfnt_off0000f759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF759 10336 bytes
SHA-256: b393dbb07175575624d3bc9f3cc1f8fd81549e58779cec950a988cdb32bf9d15

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