Malicious PDF — malware analysis report

Static analysis result for SHA-256 b004875ed2a6cc8d…

MALICIOUS

PDF

80.5 KB Created: 2021-03-25 11:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 30cee52fb929a09273f8182a12043fbc SHA-1: 104302040570e5c1b9c8af930c003953cbdffe2c SHA-256: b004875ed2a6cc8d4389cb5f62eb9e1b624312cd98ca69db38b6e72d7be600c6
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 0.9997

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://nipisod.ru/aws?utm_term=search+for+hidden+objects+app PDF link annotation
    • https://cdn.sqhk.co/kososojog/jeDheIR/mind_games_lyrics_sickick.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505699/normal_60359c402cd5a.pdfIn PDF document text
    • https://vumizopefi.weebly.com/uploads/1/3/5/3/135313358/sinoletidemepab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494674/normal_601c8c7f5c8b9.pdfIn PDF document text
    • https://vosumizajemuji.weebly.com/uploads/1/3/4/0/134041682/3063887.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/76Gif0O/mobile_facebook_login_on_computer.pdfIn PDF document text
    • https://vedasozeseso.weebly.com/uploads/1/3/4/3/134388395/0423c07ce0a0.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojiranat/CZTggNM/mogowudepaweli.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/4903327.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/benikug-satafe-budozeluj-vagib.pdfIn PDF document text
    • https://cdn.sqhk.co/remozemot/cSBDihD/lego_city_jungle_explorers_jungle_mobile_lab_60160.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://rodijegowufewap.epizy.com/besuzobuxux.pdfIn PDF document text
    • https://97ca8ee5-9e40-45cc-bd46-7bc1f23d59ff.filesusr.com/ugd/112b0f_75365d4c7b3943b8b42d10a1b31e341b.pdf?index=trueIn PDF document text
    • http://badowivisoruk.rf.gd/jixadevijavumufenut.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_6281d663d1d946e88b442fb4728d9ad5.pdf?index=trueIn PDF document text
    • http://xamaruver.epizy.com/63917542230.pdfIn PDF document text
    • http://poposumezaxek.rf.gd/letter_format_in_ms_word_2007.pdfIn PDF document text
    • http://beverotunege.epizy.com/foeniculum_vulgare.pdfIn PDF document text
    • http://gigedokaveve.rf.gd/pdf_to_dwg_converter_free_download_for_mac.pdfIn PDF document text
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_2733650313e94a6abdd2ed90c48fa1ea.pdf?index=trueIn 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_off0000f101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF101 5320 bytes
SHA-256: fa50d03bef9b6613c282e5d8ce1996434654f30f85294900bebefe7ef72a05a1
font_01_sfnt_off000102fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FB 10560 bytes
SHA-256: 0c5a6c8787ee040948454b5ed40f5d7f753240aa1ae2ca5c1842676b1b7fa241
font_02_sfnt_off000126d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D4 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.