Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b69922f3eee9ff…

MALICIOUS

PDF

79.9 KB Created: 2021-03-20 12:04:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0f01f8950c7d54d5fe8774b081ca1204 SHA-1: bdbf5121e6867c5f04a5a89bcc062b193ec4d7d7 SHA-256: 76b69922f3eee9ffeb698582078ee64ce7716c7793254a585019715f7a2881b4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO spam campaign. It contains numerous external links, including one to 'baarspo.ru', suggesting an attempt to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/123?utm_term=best+free+cookbook+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379856/normal_5ffba7389bd08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464529/normal_6023c993d5aa1.pdfIn PDF document text
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/volalazutasunetex.pdfIn PDF document text
    • http://fipagolanikobax.mygamesonline.org/que_es_preeclampsia.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/balfour_declaration.pdfIn PDF document text
    • https://vomagorawu.weebly.com/uploads/1/3/4/7/134720662/648bc85893ebb4b.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/syllabic_consonants_in_english.pdfIn PDF document text
    • https://rubovumalez.weebly.com/uploads/1/3/4/4/134458479/368c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_6041a842cde29.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/wimivunaxozopol.pdfIn PDF document text
    • http://duzixofiwisegi.mygamesonline.org/lufuzelatinamubaxipemekaz.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/xunilukegez/alpine_linux_deutsch.pdfIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_9614ca92449e47fb8f4b32ae049902c5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/64654493755.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/mowuliku.pdfIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_d08a06ad671a40eabaad95d628c831d0.pdf?index=trueIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/goginifomajor.pdfIn PDF document text
    • https://49d0234c-aae4-472d-9cb9-6192e9e03354.filesusr.com/ugd/a63595_1a19199512db4daea4d8a6faad25de8d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gawabog/metal_gear_solid_2_substance_pc_mods.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/56988496340.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/puzivuponifusosel.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/asuran_bgm_music_masstamilan.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/barcelona_offline_map.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/zekitirov.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_off0000f9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C9 5416 bytes
SHA-256: c881902783e3858c558646cb08642ba04cfa5a1d1e1f047e5bda359b6dafbffa
font_01_sfnt_off00010c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C23 10700 bytes
SHA-256: de468486e8c8e424c8aaf300303f8f18e755e691cc4964c97fccc5ce2a6942dd

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