Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2116354676028d3…

MALICIOUS

PDF

75.6 KB Created: 2021-03-18 23:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 04ecf2bfb686edd5ae48861baf08b1e6 SHA-1: 8508c19824608fd071509ee4ad0c52c7a37b6f4a SHA-256: f2116354676028d3d514ab4d551c5b937e7ac853bbc051b8ea81eceebb4c8d6e
156 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 0.9997

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 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.
  • 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/wix?keyword=ultimate+guide+to+the+presidents+changing+of+the+guard PDF link annotation
    • https://komamizidunip.weebly.com/uploads/1/3/1/4/131437982/41f0da601c2f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_601cbc6e364dc.pdfIn PDF document text
    • http://tuzutug.iblogger.org/lurelub.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/bejaweg.pdfIn PDF document text
    • https://wazivako.weebly.com/uploads/1/3/0/9/130969042/bijanesew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_6030683e23890.pdfIn PDF document text
    • https://mipoxijal.weebly.com/uploads/1/3/4/7/134709746/dasufu-basaxuwev.pdfIn PDF document text
    • http://lenagilos.22web.org/31673700630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_600fd8f2b68c6.pdfIn PDF document text
    • http://lonewawojelos.22web.org/fagoluvo.pdfIn PDF document text
    • https://tugofemupufere.weebly.com/uploads/1/3/4/5/134584107/bubugesaja.pdfIn PDF document text
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/2650619.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/zemigiduwagafu/lagu_album_bts_terbaru_2018.pdfIn PDF document text
    • http://zazupixuwup.rf.gd/java_jdk_win_7_32_bit.pdfIn PDF document text
    • http://vexibuwo.rf.gd/provinsi_bengkulu_dalam_angka_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/sofa_foam_sheet_size.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/abbyy_finereader_portable.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/48450897981.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/how_to_get_free_bags_on_allegiant.pdfIn PDF document text
    • http://xotaferuju.myartsonline.com/jual_samsung_jitterbug_touch_3.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_off0000e9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9ED 5560 bytes
SHA-256: 46b2ed6361af2e41af2003ecbd65c1f6d2e3b04a4ec5a272808354224f75cb6d
font_01_sfnt_off0000fcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAB 10480 bytes
SHA-256: 3c2f039d8828ea750ac70e2b6936b226418c2541a458e21cd388dd4504d26ba3

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