Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e30e5ebc059ee9f…

MALICIOUS

PDF

71.9 KB Created: 2021-03-26 09:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 13c66814c24da1c06f347fd3c92fa52f SHA-1: 545db1cd835b59006cc84b6725378b672cb6474c SHA-256: 4e30e5ebc059ee9fe630cb45e54244710f3bc18293150ace28bf8da8118c3a1b
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 0.9991

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 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://xajibur.ru/strik?utm_term=how+to+clean+filter+bissell+powerforce+bagless PDF link annotation
    • http://nizavevorupuj.mywebcommunity.org/is_good_for_me_synonym.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/kezijo.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/vukine.pdfIn PDF document text
    • https://nekawamanijem.weebly.com/uploads/1/3/4/8/134877182/gunemure.pdfIn PDF document text
    • https://nokajavu.weebly.com/uploads/1/3/0/9/130969653/dodovixubixutu.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/b77798a8431.pdfIn PDF document text
    • http://janafan.scienceontheweb.net/piano_chords_arpeggios.pdfIn PDF document text
    • https://xupalodigodub.weebly.com/uploads/1/3/5/2/135298884/jalosegivep-jivomubigonas-vujenefukafepok.pdfIn PDF document text
    • http://kegetisa.mygamesonline.org/5020293463.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/the_last_lecture_randy_pausch_video.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mesipupip.rf.gd/tesoguxibifitukavuw.pdfIn PDF document text
    • http://nanaxaj.rf.gd/les_fleurs_du_mal_resume.pdfIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_2a253ec2fb014f94b322cbdbfd159172.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e18549d2-6a36-42d9-b95d-24ffd8a059c8/19707141039.pdfIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_9ed480e95dfc4a85a8e1b781359933b2.pdf?index=trueIn PDF document text
    • http://wepiliga.epizy.com/wogul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d1e5a1-3029-48c2-b0f3-6ddbe4c7d98a/how_do_i_charge_my_apc_backup_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62812540-cfbe-446a-92a5-0e964f01b687/parogixibevuze.pdfIn PDF document text
    • http://wifudozakiteg.epizy.com/rs3_divination_guide_2018.pdfIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_70ba017abdc54cff8fb87998a5300784.pdf?index=trueIn PDF document text
    • http://redepigupemon.rf.gd/72178713696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/525d7da3-4b2d-4851-a4a5-7cfb87223e14/nixolevesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db3fd9fe-284e-4485-bfd8-e28eaaf04218/96179606955.pdfIn PDF document text
    • http://fudogupadi.rf.gd/how_to_write_a_book_review_sample.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_off0000dcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFB 5376 bytes
SHA-256: 5831bb49e8bba66522d5157dc74d3e182867a6f03a430d2271f00a4c2dad6bf1
font_01_sfnt_off0000ef66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 10128 bytes
SHA-256: 13c6846a30acf49ddb4f815698e3c6e969701b83785d52873331d6a9cf76b093

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