Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bcc703ea5bd2437…

MALICIOUS

PDF

69.2 KB Created: 2021-03-19 09:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5bcb70d0c93ee52830ee0fccbeef9075 SHA-1: 5a391adfe398571025ab7c7e2868f2de79836ab6 SHA-256: 8bcc703ea5bd24375bd13a8a176de61422fddc8e36723ffd928c5309d2f60697
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://dafemum.ru/award?keyword=balance+of+trade+of+pakistan+pdf PDF link annotation
    • http://napodosawukezob.getenjoyment.net/842089402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_601928479fb96.pdfIn PDF document text
    • https://korexabareruwa.weebly.com/uploads/1/3/2/6/132680962/pojasarirarafo-pebulojugu-nekegov-ziwupu.pdfIn PDF document text
    • https://benanuvez.weebly.com/uploads/1/3/0/8/130813453/mobab_xiwezidu_mumatadipunufu_xuwirusetawetu.pdfIn PDF document text
    • http://subexadedesu.iblogger.org/pokesiset.pdfIn PDF document text
    • http://tramlaweq.online/la_historia_monetaria_de_los_estados_unidos7ko5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_6030a561c131e.pdfIn PDF document text
    • http://liolika-rsya.ru/kuxidobod97p2.pdfIn PDF document text
    • http://vkysnaya-eda.site/acer_aspire_one_zg5c5q95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412887/normal_5fc953302e932.pdfIn PDF document text
    • http://itdiscounts.pro/bubafisivuvodivokejavu3w8ho.pdfIn PDF document text
    • http://shmelev.pro/corazon_espinado_sheet_musicd9rev.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/nopoxajumavojesubij.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/ffd1d5c8-8ceb-4295-99a2-dec2917e5dc0/12048977362.pdfIn PDF document text
    • http://mewivoxirogowe.rf.gd/govipusolanamalokisojap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba411ea-57e1-4fa3-8c65-ad5201ad837e/jejomalogifokorurusugap.pdfIn PDF document text
    • http://xinudigiwuwa.epizy.com/696308660.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_off0000d0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F5 5260 bytes
SHA-256: cab5e55ccde9f0984b510e2c6cf82a09b7cdf1b6626c8a306ddad9f62ce08697
font_01_sfnt_off0000e2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EE 10952 bytes
SHA-256: 01882462672344a30af400794a55609f414dcfe19a8cd68dd7f4bd5a9dc658fd

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