Malicious PDF — malware analysis report

Static analysis result for SHA-256 e715d3143b02dd18…

MALICIOUS

PDF

109.9 KB Created: 2021-03-18 11:18:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b5c2c2995f4a423a4314d3f2337c36d8 SHA-1: 1d75417e5c9e2379b42f706fb9fab8e2cde56d60 SHA-256: e715d3143b02dd182cba6887243f9dbd1326f95692b13732a0f0582a766563ae
156 Risk Score

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 0.9980

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://botokaw.ru/123?utm_term=lg+sound+bar+sj4y+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465703/normal_6015c0e01ad15.pdfIn PDF document text
    • http://bristol-yalta.run/remumebusaminukesapotok4gw6s.pdfIn PDF document text
    • http://nezatarofarix.getenjoyment.net/matofowesate.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/jozikojaterisavemoreno76jvn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416495/normal_60531670c284b.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/asme_section_ix_free_download.pdfIn PDF document text
    • http://evakuator-uga.ru/automating_excel_sheetsm1kt9.pdfIn PDF document text
    • http://muldwych.com/677482355229um1q.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/how_to_read_neptune_t_10_water_meter.pdfIn PDF document text
    • http://medicinfo.online/hp_laptop_probook_6470b_manualkq4ju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/ranilovexaguxuxotuli.pdfIn PDF document text
    • https://d0fd22f1-78bd-4368-960d-2a324028b2bb.filesusr.com/ugd/a4d998_550dc74e772d477183ace3373c7b2e2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/5367303514.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/bowem.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/xowegetamokojofapovoze.pdfIn PDF document text
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_f87770dbb4aa412a82bc68eed833a65e.pdf?index=trueIn PDF document text
    • http://fidegaf.atwebpages.com/advanced_computer_architecture_important_question.pdfIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_9d41f8d5dd9c420daf9b42eb7b05cadc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/9364546518.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/43930337284.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/happy_bhaiya_dooj_video.pdfIn PDF document text
    • http://tujupifirafadus.myartsonline.com/40603277310.pdfIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_211d1169a9a94fb1b51c386a282db6e6.pdf?index=trueIn 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
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13970 5492 bytes
SHA-256: 429343b45b389895a4fb5cf844c3ace40fb89ff6108c4e4851787512dbe88b1a
font_01_sfnt_off00014c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C21 26080 bytes
SHA-256: d3b4e35455303e35f3ec9278cf5e28b532aa4bd2e9d93316296067bf1d40a03e
font_02_sfnt_off00017668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17668 2852 bytes
SHA-256: b1887ebd4e49e2d141679365be5735aad9320d67e79b34f26cbad5d464170ffa
font_03_sfnt_off0001828b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1828B 11368 bytes
SHA-256: 955caedc5be8e55c5cb80d7e88f7a91c93c868aacd688501609fba6355da4d93