Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e679354a0d9117…

MALICIOUS

PDF

71.3 KB Created: 2021-04-03 00:40:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: aff280ce3b6d31af18b20eed717f8c44 SHA-1: 54127a539da6600e10cfcad72905cb68371cf203 SHA-256: e1e679354a0d9117a26d25f8d3dfe23432f63f7891890be16a62770104f855a2
126 Risk Score

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 0.9995

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://bologen.ru/123?utm_term=canadian+hypertension+guidelines+2016 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454973/normal_604eaea4c8635.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459917/normal_5fede480ef32f.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/tuvenesab.pdfIn PDF document text
    • http://sovumeriwox.mygamesonline.org/brokeback_mountain_espaol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_6066e4b5c5963.pdfIn PDF document text
    • http://sentytld.online/average_monthly_cost_for_life_insurance_ukqzmv2.pdfIn PDF document text
    • http://twitter-center.com/audio_technica_at-lp60_usb_belt_drive_turntable5015f.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/1000_approximation_questions.pdfIn PDF document text
    • http://copyright-supporthelp.com/4_pics_1_song_level_20_wind49q28.pdfIn PDF document text
    • http://busibear.com/goxurokemawurefudxvaxk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483839/normal_6050631d8dcaf.pdfIn PDF document text
    • http://matras-24.ru/tudajifizamawodoxakabk4qjl.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/metahuman_inc_moddiiwe.pdfIn PDF document text
    • http://justamorem.com/69499694863eziml.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/da6fc6fd-8874-4dbe-b26b-61d2e25318de/boye_round_loom_scarf_patterns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da022ccb-dad0-48a4-9b45-b768458d95de/pajonejemelaridiw.pdfIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_1742748c1e694cedb47c60d9257c3531.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e12e4f39-f613-40b6-8d52-472182939993/jinufedewumebubufipolo.pdfIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_2102b279bc5d4e6ba30c50d716994b27.pdf?index=trueIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_23e1f3cc22214059a27cc5ad12631b17.pdf?index=trueIn PDF document text
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_b200e83c5d51401ba6a430da2b8c2fce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea36f079-ea9d-477b-85d0-c47f52f2f4c0/sims_3_pets_xbox_360_cheats_unlock_houses.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_off0000d53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53D 5708 bytes
SHA-256: c4a9efa6874fea0f6c77eb6f9ed68cc77019c349ccef9b977f79999d5178b65f
font_01_sfnt_off0000e8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 10936 bytes
SHA-256: f9b822925ff1a2bac51f76ddd221f01f7dcfe459186d15924f4141a4c3720f73