Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8116a2693b75bf…

MALICIOUS

PDF

74.6 KB Created: 2021-03-11 10:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fb773e5f088d583133c14d9869baddcd SHA-1: be8237042550d1408d45998f7d5c42ce439b375d SHA-256: ea8116a2693b75bfbdedb08945552ff19baa3607b5be6612e67882f012c700a2
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 0.9997

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://botokaw.ru/strik?utm_term=gas+prices+in+washington+dc+2020 PDF link annotation
    • https://tudiputowol.weebly.com/uploads/1/3/1/4/131452732/rowoza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476288/normal_5ff156c2728d3.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/ggmbggY/25667205446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476302/normal_5fe612879f7aa.pdfIn PDF document text
    • https://cdn.sqhk.co/kefivaxepaj/5Mijhad/zufaxilufazarupatobetixo.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/3409520856.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/yidheGL/80344882962.pdfIn PDF document text
    • https://cdn.sqhk.co/sadinuko/J5iehhc/30980682948.pdfIn PDF document text
    • https://topuzuxet.weebly.com/uploads/1/3/0/7/130739133/mexuz.pdfIn PDF document text
    • http://nolesed.22web.org/adyashanti_download.pdfIn PDF document text
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/felikawanoxanowa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476418/normal_6025ed858f1e5.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/hahj5jj/studio_code_level_11.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/navy_dive_school_panama_city.pdfIn PDF document text
    • https://cdn.sqhk.co/luzorisu/hahagev/bilateral_retrograde_pyelogram_cpt_code.pdfIn PDF document text
    • https://tewukowil.weebly.com/uploads/1/3/2/7/132741555/5283326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_604043b57543c.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/gePifih/z_nation_cast_addy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tulajadulixo.myartsonline.com/49240405416.pdfIn PDF document text
    • http://wajabopekat.epizy.com/schultz_autogenic_training.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_off0000e6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A0 5700 bytes
SHA-256: a7de77aa1f6603dce600d9c8ad9c0c59f27ce885091477ee66d45c80f432dd4e
font_01_sfnt_off0000fa18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA18 10272 bytes
SHA-256: 3972f153e4a9c5022e26ee97c59acdb18e607339cd60e05e9f734db049cbc225

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