Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0087b64523644f…

MALICIOUS

PDF

86.4 KB Created: 2021-04-02 22:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2bb6342f9bd3497823cbad5d88ce239e SHA-1: 955a8194db8d7e31f1a8a4afb1743c0fd05fc6ea SHA-256: 2f0087b64523644fb8916fff09afdbb73db67db17c3248c5bc762e4248b48a7d
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=what+age+baby+bjorn+carrier PDF link annotation
    • https://virutabadipepuv.weebly.com/uploads/1/3/1/3/131398083/sudadu_fozufip_wazoxa.pdfIn PDF document text
    • http://mosquito.codes/novawofv7fk.pdfIn PDF document text
    • http://webmastervlad.ru/zosenipagipagamuzobimi5zaxn.pdfIn PDF document text
    • https://refitefajo.weebly.com/uploads/1/3/2/6/132683069/vuzalapomexuni-javaf-xoveba.pdfIn PDF document text
    • https://fokididekorup.weebly.com/uploads/1/3/0/7/130775810/jilemuduvexa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480758/normal_601fef7b63628.pdfIn PDF document text
    • https://zuwuwuxi.weebly.com/uploads/1/3/4/8/134883554/9056553.pdfIn PDF document text
    • http://braco.ru/609171955386duz0.pdfIn PDF document text
    • https://mazoguwikite.weebly.com/uploads/1/3/4/6/134614920/2631264.pdfIn PDF document text
    • https://pisaxegeb.weebly.com/uploads/1/3/0/7/130775455/nulinobu_juwosuj_webana.pdfIn PDF document text
    • https://lutomired.weebly.com/uploads/1/3/5/3/135316507/d0e2aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458388/normal_6030d7a718232.pdfIn PDF document text
    • https://piwofenuxud.weebly.com/uploads/1/3/1/8/131871692/3997929.pdfIn PDF document text
    • https://fidimamafiw.weebly.com/uploads/1/3/4/6/134624465/pijamupikenup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f48a302-f329-45eb-b2d3-f9f325b8a315/bobapikul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35825bb2-2b1a-4eba-ae15-1b032df1a6f5/39590539909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c545628b-9484-47f7-9fca-9e74de5f6a35/como_fazer_um_molho_rapido_para_macarro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de145f1-56af-494f-bfc4-82ddb1405bb3/polo_ralph_lauren_coupons_in_store.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45761d0c-583a-4db6-a945-3b14e01200dc/sharp_el-1197piii_how_to_load_paper.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_off00011497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11497 5184 bytes
SHA-256: 8c9c13932234611221fe689f753cbc4a996bdebc80759631647efbc2dbeaf6c2
font_01_sfnt_off00012652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12652 11652 bytes
SHA-256: fef38e006f7277b463452a8c6cc9c1cda5926ee52ec6b42a4b75ba344af269c5

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