Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c65b875cc40244…

MALICIOUS

PDF

78.1 KB Created: 2021-03-12 05:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5ce6b816d16952508914bd98b54dc45c SHA-1: 4eda09682bf8840d1f5c7be9382d7176779be93b SHA-256: 35c65b875cc40244d3df43ed6cddacf4a6570b1bf9f98c9312ebad31d835cdc4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be a lure for Livewire error codes. The document body, though heavily obfuscated, contains references to 'Livewire ts error code 10028' and 'wkhtmltopdf', suggesting a technical pretext for the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://botokaw.ru/strik?utm_term=livewire+ts+error+code+10028 PDF link annotation
    • https://cdn.sqhk.co/notenirikev/Xgcjgje/xbox_360_controller_amazon_fire_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/dazulegug/VSBgjhe/15923560057.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482623/normal_5fcfa9e4e607a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447885/normal_60343700bcf7d.pdfIn PDF document text
    • https://cdn.sqhk.co/fokofike/hdDgec1/tenkyuu_suisei_wa_yoru_lyrics.pdfIn PDF document text
    • http://zebolalifitu.22web.org/anthony_dasan_video_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/tazakabebilo/2yhajZj/glory_and_triumph_hockey_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387054/normal_60445eb29b02b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417329/normal_602fa5873b4f8.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxunoromi/bjb2hdH/numisavederogabubojugela.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456140/normal_5ff77208b59b8.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/safenalavojuwu/rhetorical_situation_worksheet.pdfIn PDF document text
    • http://giwurebo.rf.gd/latest_tamil_songs_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea2ab366-f8c0-4914-85ab-da79741a8ebb/76406724985.pdfIn PDF document text
    • http://romezegipoxo.epizy.com/dexekopitubofamiwaruzaju.pdfIn PDF document text
    • http://jizuwugi.rf.gd/65448896371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e2cfb1-7ec0-4a19-b480-9aeb3fb92bde/lavumer.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/72725198441.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4fa40c-c31e-40c3-b8ed-49b448ab3f76/95405997223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/100a6e42-6a3b-472b-9c66-a0a0bc0832ad/83204301057.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/informatica_bdm_tutorial_point.pdfIn PDF document text
    • http://nivuzujanux.myartsonline.com/53161722731.pdfIn PDF document text
    • http://zibakogemigana.rf.gd/56327020047.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_off0000f024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF024 5304 bytes
SHA-256: a9989b3a4ce23f7d75b3c6fb23f5774d757682fc879a7711f9be7f3d5bd8c1b4
font_01_sfnt_off00010264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10264 11356 bytes
SHA-256: 69266848d353f7f5aaf9ce2ed97815c6c7ec4dfd0be03b7ca4d7430ad8b4aa28

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