Malicious PDF — malware analysis report

Static analysis result for SHA-256 127b97575cdb91b5…

MALICIOUS

PDF

70.4 KB Created: 2021-05-19 19:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3510f1faee37d32e29fbc1d6618eb2c3 SHA-1: 7c58f195518284f2d6e997b93a8eb30c59b8f271 SHA-256: 127b97575cdb91b5115b22fe595bc9816c4e592a9c91afb82e83395a6ee6955e
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/strik?utm_term=schwinn+recumbent+exercise+bike+user+manual PDF link annotation
    • https://tigerabedudutid.weebly.com/uploads/1/3/5/3/135304069/nunidiridojoloparu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527859/normal_60018a4e0614b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414357/normal_5fdd313b06f57.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/9aba18.pdfIn PDF document text
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/e1a5e35625eb29.pdfIn PDF document text
    • https://kusipujetaz.weebly.com/uploads/1/3/4/4/134462876/nuziferavo.pdfIn PDF document text
    • https://vufobuvi.weebly.com/uploads/1/3/1/1/131163959/7f2fdc6.pdfIn PDF document text
    • https://xokijawajix.weebly.com/uploads/1/3/4/7/134726357/piwodi.pdfIn PDF document text
    • https://mufisifarugevap.weebly.com/uploads/1/3/4/5/134595961/zojikeg.pdfIn PDF document text
    • https://kizujaxaluw.weebly.com/uploads/1/3/4/3/134393650/vedobofopar-pevojo.pdfIn PDF document text
    • https://tonuvufew.weebly.com/uploads/1/3/1/4/131438708/juxulisufitulepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426688/normal_602049b23bebf.pdfIn PDF document text
    • https://tiletemilowa.weebly.com/uploads/1/3/2/7/132710791/kutos_mexamesaroputoz_jolepolenulo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/regovadeje/how_to_pack_a_book_for_shipping.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/manual_de_codigos_para_control_universal_rca_systemlink_3.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/what_happens_if_you_sleep_while_wearing_contacts.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/best_game_show_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/the_hunger_games_catching_fire_full_movie_online_putlockers.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/44906762008.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/devir.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/wivaxiroxomoradi.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/8490196357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edbe859b-4392-4055-9e19-cad690913cc8/punexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e8d9b0-e04f-4cde-8fa9-640c0ed0d25a/62966051762.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_off0000d3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CC 5504 bytes
SHA-256: ccdbd0a4736f99bc00b7fcbb099b79488c0715048dbea051bb849483171fbfb8
font_01_sfnt_off0000e66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66D 11176 bytes
SHA-256: 4503d22cab291a0e9db96d9f635443dddad4d1626a5277ef6d7df4162c0cbcb7

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