Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af9c2b2a7cbfaa6…

MALICIOUS

PDF

76.1 KB Created: 2021-04-09 07:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 92806b7d8185988d92c0d4addb4cd062 SHA-1: e116bfeb345c198435ecc9249cb5da9e24100283 SHA-256: 9af9c2b2a7cbfaa60e730b08b82d8064393203b169e164f4a3fe9d03379d79ad
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=dream+yoga+and+the+practice+of+natural+light+pdf PDF link annotation
    • http://kudikadip.getenjoyment.net/montgomery_ward_upright_freezer_manual.pdfIn PDF document text
    • https://rebumazezip.weebly.com/uploads/1/3/4/8/134860465/bebetimozu-gamoguvadew-donufudeveved-nanazivisutek.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuzadisup/lf3dGig/67019427797.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/bugewotobawulam-laxozulu-panote.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/fjgichd/small_table_and_chairs_for_game_room.pdfIn PDF document text
    • https://rorekejufekate.weebly.com/uploads/1/3/0/7/130740186/mizavom_waxawapobopexa.pdfIn PDF document text
    • https://suzuxagutif.weebly.com/uploads/1/3/4/3/134352905/midufegizebiza_jujibup_sogimugofig_zadexomezevuzu.pdfIn PDF document text
    • http://wabixekere.iblogger.org/jarebasuzovu.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/54994235264.pdfIn PDF document text
    • http://venovagom.iblogger.org/kefanokikexepisesi.pdfIn PDF document text
    • https://xoxekoxezugox.weebly.com/uploads/1/3/0/7/130738790/sobosujurinotiwagadi.pdfIn PDF document text
    • https://volasetabis.weebly.com/uploads/1/3/4/8/134879514/3752718.pdfIn PDF document text
    • https://kagebavewijove.weebly.com/uploads/1/3/0/7/130740568/sopivedi_mikivekuz_matenunabi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2cdd986-b3c4-41fc-9870-cc8dd6cac415/98933227434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375a8f51-ef1a-4c35-8f8c-7532de3c2daa/jizorobovozokulute.pdfIn PDF document text
    • http://rugefar.myartsonline.com/best_architecture_company_profile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03bc9b68-5a58-4c67-b3ac-1485f0acbb33/what_is_knowledge_self_efficacy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d51fe24-8069-4996-8195-c6143918dd37/how_to_trade_on_binance_for_beginners.pdfIn PDF document text
    • http://puzuwekamem.epizy.com/wawopakeg.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_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 5492 bytes
SHA-256: a8f21096a63282654d256062b5ee94170d9bcd7b00b14488c0794a477a3041ad
font_01_sfnt_off0000fe58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE58 10772 bytes
SHA-256: ed29fa88fcaa5a00a553b71b72c9cd846c1e99831da104ddcecbbc0aff3d9100

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