Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a37168b2be4d68…

MALICIOUS

PDF

80.4 KB Created: 2021-03-22 14:40:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7a5587594119a2cfa812bedcddac7e32 SHA-1: b38d8159ad92150bba9b1cd5c6bae2d707e43066 SHA-256: 95a37168b2be4d68149db7ba76bd6892aaccdf5b88bbf5054c894b29cb151107
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 0.9990

Heuristics 5

  • 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 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/strik?utm_term=goodnight+gorilla+free+printables PDF link annotation
    • http://blockingscenery.com/buwebovilopoguzjpd7.pdfIn PDF document text
    • http://zootime.store/weightlifting_percentage_table9jnzh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_603c881caf9c5.pdfIn PDF document text
    • https://cdn.sqhk.co/xilobotinisi/hebiahd/icy_hot_smart_relief_cvs.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/9zOjgJN/archery_games_boston_waiver.pdfIn PDF document text
    • https://cdn.sqhk.co/xorilulog/YiejigR/polesabunuse.pdfIn PDF document text
    • http://usesalle.xyz/dante_divina_commedia_inferno_canto_5t8xru.pdfIn PDF document text
    • http://allmedbook.com/small_business_loans_for_veterans_spousest48ax.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/ilNeigg/leaf_soapstone_incense_holder.pdfIn PDF document text
    • http://damita.fun/3_types_of_comparative_research90wcy.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/eYmCijR/notes_payable_asset_or_liability.pdfIn PDF document text
    • http://setofexperience.site/6377504206y9jhj.pdfIn PDF document text
    • http://ipoteka.net/remington_700_bdl_30_06_synthetic_stock_for_saleda0y0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421215/normal_604173d28fb29.pdfIn PDF document text
    • http://natur-green.fun/11998109850ltbj7.pdfIn PDF document text
    • http://hq-cleartv.info/25533435273n8b67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404529/normal_5fe83f728e034.pdfIn PDF document text
    • https://cdn.sqhk.co/siripeka/eWNFjcp/jofoperime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_600d0b9cb4d29.pdfIn PDF document text
    • http://opensoda.pro/sigetadewagijirso03n.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/jbfwhf8/business_plan_examples_for_small_businesses.pdfIn PDF document text
    • https://cdn.sqhk.co/tigufarejeti/BxjgnGW/form_5_account_bab_1.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/52e6dcb4-03e6-4f3f-bdea-9c943acb78fb/trig_identities_worksheet_algebra_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638a270e-662e-4963-812a-767b7fe7d1a2/zinitiganuwiramivofuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb33d9ce-c398-4b45-a102-d8fa289e249d/36036804986.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_off0000f167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF167 5476 bytes
SHA-256: 400780cbdc1d2f7e1d814404a6da8846c6b79fe25d13d85abc50cfe0c03fa2c0
font_01_sfnt_off000103ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EE 2608 bytes
SHA-256: 8433d4704388b144586566318a7734f3d70634cbf88964510bd5c163e4618f19
font_02_sfnt_off00010f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5A 10816 bytes
SHA-256: 7638ed4525f84ac71a3df220518032a171943551f677a736363d325984a550b8

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