Malicious PDF — malware analysis report

Static analysis result for SHA-256 f529ca7051800348…

MALICIOUS

PDF

90.4 KB Created: 2021-03-19 09:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 12e36207750644082f308c0226527046 SHA-1: 17f5c88e1019d8f3f78842e01f24f29a884148f9 SHA-256: f529ca7051800348783bdae95207aed397451c51eb4e51bac1e80696de7dd336
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, forming a link farm, and is flagged by ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate an attempt to redirect users to potentially malicious content. While no scripts were explicitly extracted, the overall structure and heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://jottigo.ru/award?keyword=adenosina+5+trifosfato+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459054/normal_5ff027ec8919e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449406/normal_5feb1174b0ccb.pdfIn PDF document text
    • http://kubodir.22web.org/molivevin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5fec97afb15bb.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/Lgdghjh/90428821874.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/ghUUhit/91197053064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487187/normal_6026f971c36c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447108/normal_5fe347caa8457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500446/normal_604ace041f7fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426071/normal_600033cf22938.pdfIn PDF document text
    • http://fijixedi.22web.org/47778309737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458412/normal_604309c1db7ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465277/normal_600fbc3dc2f3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401555/normal_6015b3545a37e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452587/normal_602af8aa142d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425926/normal_60286240e62a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450260/normal_6014abdfe9607.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462980/normal_5feb80eeb4ece.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_0ac3af861df749819c6ede68e76c98a1.pdf?index=trueIn PDF document text
    • http://jikelofov.rf.gd/gonovujubibozabi.pdfIn PDF document text
    • http://borovob.epizy.com/6912171093.pdfIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_9b6f8a53dd8b4df99deaa5d9ceb777ec.pdf?index=trueIn PDF document text
    • http://siwapulozexudu.epizy.com/que_es_el_principio_del_placer_para_freud.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAED 4904 bytes
SHA-256: 9a77952cab8da83ff9a3be2e12be22eb02d5672a5bd30f17bf2cf43503f874de
font_01_sfnt_off00010b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B98 7908 bytes
SHA-256: 3514715360a4ac7836cd3b18d255c9765bffafda7be98b89a9052424c313c6a2
font_02_sfnt_off00012161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12161 13004 bytes
SHA-256: dce9c0a3c5308a04cefe2f3d37e6f2a69c40a665d2c1aef5bc3afcb048262958
font_03_sfnt_off00014be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BE7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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