Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c454293dc09a790…

MALICIOUS

PDF

67.4 KB Created: 2020-11-30 01:13:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b1068a828774b2b0ccef55cc5b71df0f SHA-1: 53a3dd4da3f00c7509a13caad9dfab914cc356e0 SHA-256: 7c454293dc09a790507dde2ee605afbd18ea3bd44f0310dc4ebb4117fea500d7
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 0.9998

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://traffking.ru/123?utm_term=mn+genealogical+society+library PDF link annotation
    • https://wubugivaruj.weebly.com/uploads/1/3/4/6/134669137/955932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_5fad948ed4eda.pdfIn PDF document text
    • https://kesizizuju.weebly.com/uploads/1/3/4/3/134384541/54cc43568398f.pdfIn PDF document text
    • https://tafajasezo.weebly.com/uploads/1/3/4/3/134312542/5572950.pdfIn PDF document text
    • https://tumekisegazuf.weebly.com/uploads/1/3/4/6/134611428/jevonezijeguvopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376379/normal_5f9dc32fa215a.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/suximawo/61185663148.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/innocent_steps_english_subtitles_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aedfb7be-fcf6-4852-b3d1-125be7072068/20814956784.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/774434497.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/nagunuvotadeg.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/togiworofisovajukodabola.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/edison_cylinder_record_price_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b9e5d78-a31d-4239-82c6-35c713298dff/38856597850.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/bahujan_samaj_party_song.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_off0000c979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC979 5216 bytes
SHA-256: 6058d70c96ed84c99b17c9431c58ec0d95823119c962a2de5aad04c73d4226fa
font_01_sfnt_off0000db58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB58 11072 bytes
SHA-256: b763be90452b9228fcd8237f6cae05bfd5d6383798606a62712af5a20100684f

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