Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dcda1eb3e1123d3…

MALICIOUS

PDF

86.1 KB Created: 2021-04-30 05:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9d7935190b5f4da0a5e2eb7e27a766ea SHA-1: 50d7d6e01723d8913620873a1532f974fb79f668 SHA-256: 7dcda1eb3e1123d3d89cabff475fbc57de5cdbab199d58317e5835137e0a80f7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though partially garbled, contains text related to 'note 3 neo launch date in india', suggesting a lure.

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://dugedepap.ru/strik?utm_term=note+3+neo+launch+date+in+india PDF link annotation
    • http://xulodol.mygamesonline.org/16965543810.pdfIn PDF document text
    • http://kopolade.22web.org/15376853119.pdfIn PDF document text
    • http://silver35.ru/25075947413wbhq8.pdfIn PDF document text
    • http://tigafik.mygamesonline.org/referencia_bibliografica_de_un_apa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417329/normal_5febb108d48f2.pdfIn PDF document text
    • http://gudituxubimof.22web.org/luces_de_bohemia_para_elisa_karaoke.pdfIn PDF document text
    • http://ralenexixozuk.iblogger.org/digital_transformation_reports_world_economic_forum.pdfIn PDF document text
    • http://masterpowerpoint.com/how_do_you_start_a_conclusion_sentenceq7u5t.pdfIn PDF document text
    • http://xadixul.66ghz.com/kemamewakipizetaben.pdfIn PDF document text
    • http://pek-24.cc/pilikojurowefidakec2pg9.pdfIn PDF document text
    • http://sun-italy.space/lisiwilo908w.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/abstract_reasoning_questions.pdfIn PDF document text
    • http://lixusopo.mywebcommunity.org/27051857792.pdfIn PDF document text
    • http://amsidisi.xyz/bafubekh7oo.pdfIn PDF document text
    • http://zixivudu.getenjoyment.net/lunemunikawufajoda.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/definicion_de_airoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_6016a513b6f36.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xojazexodiwosi.epizy.com/suwiwajoredigu.pdfIn PDF document text
    • http://buzidasore.rf.gd/91168121963.pdfIn PDF document text
    • http://xekibedeba.rf.gd/vodagawalakukarekemu.pdfIn PDF document text
    • http://sejofinudagiji.epizy.com/xenobiotic_metabolism.pdfIn PDF document text
    • http://genurenifu.rf.gd/nikon_p_223_3x9x40_bdc_600.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC90 4768 bytes
SHA-256: b5b5a145df504b546e613f68121dd828501711ccdb4b6c09a50cbb65dcfd907d
font_01_sfnt_off0000fcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB9 12052 bytes
SHA-256: ab6cc738837d62a5b40ad4a59fd91ad5a0aa33b31459b2919932dd52fb9ce1f0
font_02_sfnt_off00012566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12566 16264 bytes
SHA-256: 06b6d92114adeda75af3f96122d26ce5b75c0c67043a3966fe4e60826377f072
font_03_sfnt_off00013aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AEA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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