Malicious PDF — malware analysis report

Static analysis result for SHA-256 056410bf6e932d6e…

MALICIOUS

PDF

71.3 KB Created: 2021-03-16 09:55:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 808992bf28bd0643ab8358e37fda0d1a SHA-1: 975ec0655bb3c8e4ea0c4bd8f0fae44ababb53de SHA-256: 056410bf6e932d6ede4c47b110076501755aecb1c7fb3d2bd7e13a473f5a6401
186 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. 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 0.9998

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://baarspo.ru/wix?keyword=acura+tl+type+s+manual+for+sale+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409417/normal_5fe7707ee5cc2.pdfIn PDF document text
    • https://kofovozeregom.weebly.com/uploads/1/3/4/3/134313602/tiperatapomodamese.pdfIn PDF document text
    • https://ruxetire.weebly.com/uploads/1/3/1/3/131379726/e5e8074a0.pdfIn PDF document text
    • http://zunololanuxigu.sportsontheweb.net/berlitz_english_level_2_download.pdfIn PDF document text
    • https://zexajupa.weebly.com/uploads/1/3/4/6/134692079/873095.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/aafa525e77cb991.pdfIn PDF document text
    • https://zomereke.weebly.com/uploads/1/3/5/3/135397468/marenufewumi_takenojesozamit.pdfIn PDF document text
    • https://mitabepomumo.weebly.com/uploads/1/3/1/8/131872015/fuloj.pdfIn PDF document text
    • https://zokaguwozan.weebly.com/uploads/1/3/0/7/130738936/pabapuzaxaviw-ruvazawirabaje-tanonoxapeseta-xibedepetafumid.pdfIn PDF document text
    • https://gotedimonov.weebly.com/uploads/1/3/4/7/134761190/zitelazemaguna.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498392/normal_5ffb8e14002d0.pdfIn PDF document text
    • https://rogasiwenebagan.weebly.com/uploads/1/3/1/3/131380029/kewarewipup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapizodipe.myartsonline.com/89757636006.pdfIn PDF document text
    • http://zilisidojaze.myartsonline.com/83427709631.pdfIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_8d35f5e7f6df4af5917dd90f2f4c79b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezetega/blackberry_z30_android_phone.pdfIn PDF document text
    • https://e29f0852-aa8c-4fc4-a5db-fcd144ab7086.filesusr.com/ugd/b730be_d0f4334cfa2846b19e3bf670e69c8b32.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/43464148889.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/ledorimon.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_off0000d83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83A 5252 bytes
SHA-256: 4759f57806c5414319a59e70212aa2d50c39f7648a8cc753804b4dd154238620
font_01_sfnt_off0000ea0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0E 11148 bytes
SHA-256: 654e1f251c6d045e1c840ead85f56483927d153d3e16f95d2999b93003cc024f

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