Malicious PDF — malware analysis report

Static analysis result for SHA-256 7035fd2cdff3d626…

MALICIOUS

PDF

83.1 KB Created: 2021-05-06 23:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 55d0a4b62306f3d8eba9fe6cb34e89a8 SHA-1: 1dd9e6061a18a2fa038c8f6f0a0bec13a0bbf78e SHA-256: 7035fd2cdff3d626d26075b87b63529073afefd3fd49f81c4d0b636fb2686864
186 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. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=how+to+draw+a+dog+face+step+by+step+realistic PDF link annotation
    • https://foraketarikovef.weebly.com/uploads/1/3/4/6/134608655/6801253.pdfIn PDF document text
    • https://nebobaxewakizix.weebly.com/uploads/1/3/1/6/131637309/fe633de25.pdfIn PDF document text
    • http://burivuvuju.medianewsonline.com/88404334474.pdfIn PDF document text
    • https://tisawisapapaw.weebly.com/uploads/1/3/5/3/135326074/durebanumanuv-xopudu-gasepiben.pdfIn PDF document text
    • https://denonifo.weebly.com/uploads/1/3/4/7/134709080/napebesig.pdfIn PDF document text
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/xowojedadikekog.pdfIn PDF document text
    • https://betutoza.weebly.com/uploads/1/3/4/8/134899773/1314527.pdfIn PDF document text
    • https://rewiwuzaziba.weebly.com/uploads/1/3/5/9/135959403/masigukev_zifivo.pdfIn PDF document text
    • https://jatisarekitikez.weebly.com/uploads/1/3/4/6/134661612/nuzitebakimajaviwugu.pdfIn PDF document text
    • https://lijasefevofik.weebly.com/uploads/1/3/4/8/134889997/wotiki.pdfIn PDF document text
    • http://sumodena.getenjoyment.net/lotof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b5278b1-a436-4e9f-8a18-94f6dce63cef/womigatusumipopimobusima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e5489fd-e71e-47f9-b841-eb4df3d1da4b/kajaweperipikagutojazopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6a54772-c85d-4188-83cc-57cc03a3f2b4/2017_lexus_es_300_hybrid_mpg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd52e86-b21d-4dbf-b213-b209231c0ea0/etapas_del_proceso_de_investigacin_cientfica_con_enfoque_cualitativo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c5751ba-2c59-44f5-a36e-3c9add4e8646/93216830891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/768ca857-681e-4347-8c42-9078699e119d/the_saxon_stories_tv_show.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_off00010846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10846 5620 bytes
SHA-256: 93943046de34305ac12c08357b4b9926fbd6842e711142ca41849a1d90857b92
font_01_sfnt_off00011b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B89 10600 bytes
SHA-256: eaf2302ec203aacf57d52c6200ba855b9f96bba6f04ecef240471ef22203f3e8

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