Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fec6506e3882a9…

MALICIOUS

PDF

87.1 KB Created: 2021-05-15 16:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1a54f14f4dba6f70246455961be270b9 SHA-1: 74308eda0d83a7ed1a9bb0bb2d3e08a5d3c2ec98 SHA-256: 95fec6506e3882a90a2b1fa89ca9bacfc3e020ea30381bc1075f9a95fc84c19e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://fokemale.ru/strik?utm_term=cuales+son+los+dias+festivos+mas+importantes+de+estados+unidos PDF link annotation
    • http://tactical-jacket-sale.shop/936563951261z4sq.pdfIn PDF document text
    • https://rigavimiba.weebly.com/uploads/1/3/0/8/130814992/6ef984e6f19e48b.pdfIn PDF document text
    • https://pugojowu.weebly.com/uploads/1/3/4/3/134334477/7465429.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/ijZkjdf/50069790640.pdfIn PDF document text
    • http://trylait.club/83026230647vgns7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_60541d30f29d5.pdfIn PDF document text
    • http://ru-en.xyz/fewidasulemuds7wtq.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/jeggKJr/80719926469.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/M65hhij/zemutakivev.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/jch9vhf/sizafifazol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_6019c18a332ac.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/i4yqgKK/14877917065.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
    • https://s3.amazonaws.com/kovilowab/aluminium_sheet_cost_per_kg.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/divergent_fanfiction_four_is_tris_brother.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/32851639631.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/what_does_a_music_note_tattoo_under_the_eye_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/losevixakoxazivesijibano.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/90187346907.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001080a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080A 5152 bytes
SHA-256: 83ba3c810c4b3cc9b7083717f584ccf6810c54a3728364c5597bc13095fe0849
font_01_sfnt_off00011981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11981 12076 bytes
SHA-256: e69b5531a37ee725e4733b4d7eec967878e1083e3c63654fb065dc2089d1aaec
font_02_sfnt_off0001409d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1409D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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