Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d907b3067731a5…

MALICIOUS

PDF

76.5 KB Created: 2021-05-21 00:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f0c61be3ce0b798328417661321e0b9c SHA-1: 59ab581a195d7553d136cae1aef2038968f315f7 SHA-256: c1d907b3067731a56d46fba9345fc0d25dbecc6d09321771fc1db61701a9d701
156 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 0.9991

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 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.
  • 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://dugedepap.ru/strik?utm_term=how+to+win+capsim+round+3 PDF link annotation
    • https://miraxinarenipu.weebly.com/uploads/1/3/5/9/135963033/vaneziwedefajov_numeriluw_xajamolutaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412173/normal_60013fa8b658d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_604736e5cfbbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490739/normal_5ffe439abdd97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487894/normal_602379f4dec29.pdfIn PDF document text
    • https://rofokaragi.weebly.com/uploads/1/3/2/8/132815015/543807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447273/normal_6035e28dd1ed0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404966/normal_6056197a176de.pdfIn PDF document text
    • https://nigerizebamogut.weebly.com/uploads/1/3/4/5/134596745/7033919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423148/normal_6018ccf7b2e45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416939/normal_6026326099788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_60240d350749f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467581/normal_6050a7c337b0d.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/dbfe7e53-8d76-48f6-9018-b95cc01fea17/gaxoxibukaxagexekaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8084cfa-c64b-4fe1-8214-7f322a6fe4ad/54368470595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a92370-c929-42d6-88f2-d547ffa4d199/pirasezutolabelaxupi.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/86357190059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e0421a5-19d3-4259-b1d9-df5e72d47d8b/love_yourself_song_lyrics_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef3e87a-0746-4693-88fb-94e736cdea4f/57321099740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1b1523-48f5-4cf2-bc27-bf843350022d/how_to_program_dish_network_remote_without_the_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/027469b4-6e60-43ec-93aa-25c108a3da9e/canvas_old_skool_vans_white_womens.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/electrical-_insulating_garolite_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/solar_system_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/how_to_unjam_a_bostitch_framing_nail_gun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2af33af-c8b3-4c42-8843-ab1c0839bb8d/bersa_thunder_plus_pistol_review.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_off0000ecf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF9 5404 bytes
SHA-256: 16d2643a087b43b43b9749ec424ab7b84d479f0f9ef5084fd87f739eaa3e4033
font_01_sfnt_off0000ff55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 10984 bytes
SHA-256: 92d98410827de0af76599c9f10b90b7a270582de840a4e6bc7002d9d62ab33d7

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