Malicious PDF — malware analysis report

Static analysis result for SHA-256 be65ac256d2d0beb…

MALICIOUS

PDF

77.0 KB Created: 2021-04-22 12:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3e7f294c264ad6b451e782351a25f5ff SHA-1: 36fb9d9038597dbbeeb5ef5d24f4cefab98d73ea SHA-256: be65ac256d2d0bebe809fdead6824580bc1b1c3d67bede4e8e06b5dd628a5d44
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://baarspo.ru/strik?utm_term=kitchenaid+pro+600+bowl+adjustment PDF link annotation
    • https://birivisixakaxe.weebly.com/uploads/1/3/4/6/134608058/ginakajekaz.pdfIn PDF document text
    • https://wovinimupilof.weebly.com/uploads/1/3/1/4/131453577/tivir-guvusikikesel-ziwaxodinamabij-fenejo.pdfIn PDF document text
    • https://kawavaturitavo.weebly.com/uploads/1/3/5/3/135321378/bikanasezogapi.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/gutukazagomova.pdfIn PDF document text
    • https://fewegako.weebly.com/uploads/1/3/1/4/131453302/5017687.pdfIn PDF document text
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/fuvopo.pdfIn PDF document text
    • http://yozi.store/26991791303xikvv.pdfIn PDF document text
    • https://zajodufukotu.weebly.com/uploads/1/3/1/8/131857357/5404887.pdfIn PDF document text
    • https://revewodozuxun.weebly.com/uploads/1/3/1/3/131398596/5082016b31ccbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405674/normal_5fcaceb7e6b5d.pdfIn PDF document text
    • http://xitnet.fun/90s_80s_reggae_offline_songsf9q1g.pdfIn PDF document text
    • https://fofifakexetag.weebly.com/uploads/1/3/4/3/134345684/124072.pdfIn PDF document text
    • http://sweetmeet.online/japejufuet2dm.pdfIn PDF document text
    • https://fewanisip.weebly.com/uploads/1/3/2/7/132712603/suwizabus-nafedoxexogidi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477620/normal_5fdceed43484f.pdfIn PDF document text
    • https://dujefeva.weebly.com/uploads/1/3/4/5/134589135/xudazujole_sutetosejudev_gifiv_fejabokus.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/2357488.pdfIn PDF document text
    • https://kiwaluraxipexe.weebly.com/uploads/1/3/5/3/135326690/ropezatal_vubikox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 5888 bytes
SHA-256: afc421d227f784ec18e451b0d3cdd8781f2a63837fa76dbd6d4fc80a27a5f5be
font_01_sfnt_off0000ff57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF57 10944 bytes
SHA-256: bb2bd36adfed0dfae2085ef3bff4e47625b386eb016ff6aa281cf979cc20353d

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