Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c9468a80ec60db…

MALICIOUS

PDF

80.8 KB Created: 2021-03-27 14:51:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 071589eab0423149acea7099db2ab2c3 SHA-1: d78006fa1f948edc438cc69f3ae7ab7dd1dd9590 SHA-256: 19c9468a80ec60db069d8f55c6f779f750c87bce609fc4dbba33eae9ed03a6d1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of 'utm_term' parameters in some URLs further supports a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=speedfan+4.+45 PDF link annotation
    • http://penafur.scienceontheweb.net/18716737231.pdfIn PDF document text
    • http://cabinetshub.xyz/3098468042wcsh7.pdfIn PDF document text
    • http://ganoget.scienceontheweb.net/joint_venture_accounting_in_sap.pdfIn PDF document text
    • http://mavogevuz.getenjoyment.net/patofisiologi_gangguan_afektif_bipolar.pdfIn PDF document text
    • https://xekuvezenigut.weebly.com/uploads/1/3/5/3/135346982/4293140.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/6300217431.pdfIn PDF document text
    • http://tejidirexe.mywebcommunity.org/criminal_law_guidebook_queensland_and_western_australia.pdfIn PDF document text
    • http://opt05.ru/lg_steam_washer_instructionsgluw0.pdfIn PDF document text
    • http://dekiweragaf.mywebcommunity.org/bioshock_rapture_book.pdfIn PDF document text
    • http://bathforlegs.xyz/nc_drivers_license_renewal_online_requirements2n7u1.pdfIn PDF document text
    • http://tofugezupeb.mygamesonline.org/53943066645.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/visosodiraxeluj.pdfIn PDF document text
    • https://nedugapepo.weebly.com/uploads/1/3/4/2/134265444/risebas_befovagufumot_ratupagesa.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/vipuwebogabaxidoxuri.pdfIn PDF document text
    • http://prizinsta24.space/baixar_jogos_infantil_gratis_para_androidsk8yh.pdfIn PDF document text
    • http://jajuviramigawo.medianewsonline.com/balon_gastrico_complicaciones.pdfIn PDF document text
    • https://gewolurigidanax.weebly.com/uploads/1/3/1/3/131383018/3003324.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mifojizu.myartsonline.com/maya_angelou_facts_about_her_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aba4bcb2-4768-4c12-80ac-97873fc69070/25891820510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b49b44-099b-41bf-88ca-d99756e3573b/how_to_thread_the_singer_fashion_mate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/883fe255-2e14-420b-9ed1-32f45487364d/mobekipowelududimam.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD96 5076 bytes
SHA-256: 0571c47aeb661de70a8c98c77c3aef8b13b69d6a6dfc8713aa021cefb2014c6f
font_01_sfnt_off0000ef03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF03 22008 bytes
SHA-256: 377005dd1f3aaf5e83684e9ad2d6b4fc628771ab3004b3145fdbf9d727131495
font_02_sfnt_off00011f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F54 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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