Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae870c91127644a7…

MALICIOUS

PDF

73.9 KB Created: 2021-02-20 12:42:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2b19d5b2e35c683fd6e58fa1bc5f1ddb SHA-1: 38abe2bb41cf749d48f4718ecf571c7523d3d9ce SHA-256: ae870c91127644a72b32feaa4b4ca1516e57ba21efd46a64dc4e7d858569a07f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. The document contains a large number of external URIs, including one pointing to "baarspo.ru", suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=ninjutsu+techniques+pdf PDF link annotation
    • http://goodsun.space/7854428118113ott.pdfIn PDF document text
    • https://mafoxoluz.weebly.com/uploads/1/3/1/4/131483222/vetagixololikim_mukowufozej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471096/normal_602a119e76f86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529095/normal_60052103556a7.pdfIn PDF document text
    • http://zathkatow.xyz/trails_in_the_sky_sc_import_save5l64w.pdfIn PDF document text
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/pixojipirit.pdfIn PDF document text
    • http://karnaval.host/case_files_anatomy_freeesvti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_6019bcbe8ae8f.pdfIn PDF document text
    • http://springwin.space/bilusokatiguvisom4kw4v.pdfIn PDF document text
    • https://kaxamutibe.weebly.com/uploads/1/3/5/3/135348628/budesatopugejopize.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saxuvoluzoz.epizy.com/29191217916.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/nagojogegozogasiv.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/999_camera_community_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/equifax_credit_report_dispute_address.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/guide_d_installation_fibre_sfr.pdfIn PDF document text
    • http://pavadujutupa.epizy.com/copepodos_marinos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C6 3628 bytes
SHA-256: eb80e511a9bc42dabda656224b6cf87219c3ef4f82b21a6df5689c96370fee77
font_01_sfnt_off0000e5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AF 5076 bytes
SHA-256: b7950f6e7bcd9a41a2e244c1f96b836363de53f3405a7f1d3a4493376301ecfd
font_02_sfnt_off0000f706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF706 10508 bytes
SHA-256: 39a5b5b3aa486756001fe3240fdd570d618191bb510addb2080acb20a60a2775

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