Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a1e191fc3829d8…

MALICIOUS

PDF

69.8 KB Created: 2020-12-23 10:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 814d051dbfb4bfeb06f8ceeab2529121 SHA-1: d4ad65b04bd4f7fafc31ded31a2ee446f1f6d6fd SHA-256: 45a1e191fc3829d8955c9226d362ecfd1f683cef2107b12698c69458a8eb423a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://trafftec.ru/wb?keyword=newborn%20baby%20snake%20identification%20florida PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/391582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470699/normal_5fb8d2c43dd3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f88904a87786.pdfIn PDF document text
    • https://dofafurubes.weebly.com/uploads/1/3/4/7/134762343/janupebutunonutolapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5fb7c4c0278ed.pdfIn PDF document text
    • https://zivawopoxiba.weebly.com/uploads/1/3/4/3/134355714/9030937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_5f87648184e9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388183/normal_5fd6f241177f1.pdfIn PDF document text
    • https://dibekojiworibo.weebly.com/uploads/1/3/1/6/131637919/8779645.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/marapabi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386073/normal_5fdba033c688a.pdfIn PDF document text
    • https://xuposebifaperep.weebly.com/uploads/1/3/4/6/134673232/befawabefepa-gijodititejoso-lugabijur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/the_history_book_dk.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/fozupegekesojomama.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/etea_guideline_posts.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_off0000c55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55F 5168 bytes
SHA-256: 85ae934e09ec0ef5c9e77022b8e5a5074c8103c51cbcf01af0a3404cdd42dcc1
font_01_sfnt_off0000d713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD713 11132 bytes
SHA-256: 3ea89c43030d99ef660f7f8956d68f6b3040138fd9ac0bdaa3cf553731f45127
font_02_sfnt_off0000fc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.