Malicious PDF — malware analysis report

Static analysis result for SHA-256 7487f64e33f18f6e…

MALICIOUS

PDF

83.7 KB Created: 2021-05-14 08:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e5c197ece6e5c84644bb53dd11178768 SHA-1: d64c13f4413038d2566b217d0d38c5738c4a439f SHA-256: 7487f64e33f18f6e25b89036526c1a9c7063146154ea3266dafdc701cc6e488b
186 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 0.9998

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.
  • 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://resalured.ru/strik?utm_term=glen+echo+ravine+clintonville PDF link annotation
    • http://bighome.space/fusionner_document_creator80wwq.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/dixigekonevitetaninu.pdfIn PDF document text
    • https://bifurizikekoson.weebly.com/uploads/1/3/4/6/134690439/logunisij_rojifubo.pdfIn PDF document text
    • http://seomagnat1.online/bifuxeruveworejolipedekagkomn.pdfIn PDF document text
    • http://sale50.pro/gesuvizuvikapewerixariryu3x.pdfIn PDF document text
    • http://stavki.link/7753484460009cec.pdfIn PDF document text
    • http://shop-profildoors.ru/81070326926cnim.pdfIn PDF document text
    • https://xivexibajewubud.weebly.com/uploads/1/3/1/0/131069970/gaxevazera_rawin.pdfIn PDF document text
    • https://guduzuzej.weebly.com/uploads/1/3/1/6/131606672/gugixatijo.pdfIn PDF document text
    • https://ludebopukum.weebly.com/uploads/1/3/1/3/131380916/5337918.pdfIn PDF document text
    • http://ipai.online/7354891670fa2fj.pdfIn PDF document text
    • http://ogranicbio.fun/what_to_get_someone_who_loves_dungeons_and_dragonsq3c6x.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/zakunafu/how_do_i_change_the_bulb_in_my_hotpoint_oven.pdfIn PDF document text
    • https://bf5f3f24-cfb9-4aec-9f01-83e6d863dc5b.filesusr.com/ugd/1f4526_2891c72675fe4354910f13be73821e71.pdf?index=trueIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_0c03aa48c6154eb6a6bbb0edcc8c8620.pdf?index=trueIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_34461ab12da34a43a3522a46567c252d.pdf?index=trueIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_5ed183bf08444d5f9ded6dcae11b2b7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/20651819086.pdfIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_6adc324a0bc24b3697f45745e2e58ce2.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://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_off0000f305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF305 4800 bytes
SHA-256: d2fa5f0bf612b8e14e4eb0865d11f1ea57ecc23c3ff1221061d7b379dbcad7eb
font_01_sfnt_off0001035b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 10760 bytes
SHA-256: a65239966788336c3e3a1a5dc280ec8e77ee97b6aba9caef08795e002ab6e29e
font_02_sfnt_off00012865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12865 16796 bytes
SHA-256: 1e907b7fd746356a429d753db4e438013f858464c452dc3ed15046a073ce5b96

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