Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe95c01a5b92458…

MALICIOUS

PDF

83.8 KB Created: 2021-04-26 18:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0112e2cd7b72ade7241c2a8e67cccbc9 SHA-1: 5752c18836a05fb30591c6f00b999b71654d5b17 SHA-256: 4fe95c01a5b92458804c80ebcb261d2f4173bd1f70b44f161711406c2ee64539
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-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://gimoguvi.ru/strik?utm_term=battery+charger+for+pride+mobility+jazzy+select+6 PDF link annotation
    • http://buwubaled.mywebcommunity.org/revelation_14_6_lldm.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/72816533133.pdfIn PDF document text
    • http://xipodijajul.sportsontheweb.net/bangla_books_online.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/gjgde01/beraloxupitomoj.pdfIn PDF document text
    • https://sotemupavunu.weebly.com/uploads/1/3/1/4/131413148/0f108930.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/kLgcohf/30696163117.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/Gjjijeh/telegram_definition_and_examples_of_hyperbole.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/bjThfjf/the_sims_urbz_cheats_ps2.pdfIn PDF document text
    • https://cdn.sqhk.co/kogujipubap/7Cuhaie/unmatched_air_traffic_control_future_updates.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/nixepatiduzepekozogovavab.pdfIn PDF document text
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/23f1adf1dc15fe.pdfIn PDF document text
    • https://nokurujifeseg.weebly.com/uploads/1/3/4/3/134355409/visejiviwonim.pdfIn PDF document text
    • http://mazejofeg.mygamesonline.org/jubojojejaj.pdfIn PDF document text
    • http://kivolugog.mypressonline.com/oogway_ascends_piano_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/segexiji/kwLicuu/channel_8_live_weather_radar_dallas_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/sopaluwokaja/gjjqIYh/risk_analysis_tools_excel.pdfIn PDF document text
    • https://vixikuladiwepev.weebly.com/uploads/1/3/0/7/130738731/gudugodaveku_biputeguteto.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/b47d9404-58b9-4b7e-a3ea-7b686e2a8c70/70545103654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8eae71d-75db-4960-a576-4c8398902076/canon_speedlite_580ex_ii_price_in_australia.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_off000105d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D2 6140 bytes
SHA-256: a09290a3f9b17e3e18a8e55b010a31b796ee899a8f2d0b144ba390d6e9a45836
font_01_sfnt_off00011aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA1 11496 bytes
SHA-256: 638366f89424b0431460190360596d327a9cc1f5ba05d34247a8eb1db9ab412e

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