Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b14fb716f05d79…

MALICIOUS

PDF

75.0 KB Created: 2021-03-20 09:36:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 312ebb91f59dcc42a29cccb4939f2530 SHA-1: df6b3c9bc41b4deb3a48d47ff7c6efeb7a6ae320 SHA-256: 49b14fb716f05d799ca46861845a713df6cbc679e6624d478c71ddf66a7ba4ce
186 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 0.9993

Heuristics 6

  • 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.
  • 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://resalured.ru/wix?keyword=pizzeria+profits+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/vibisidumes/ifOjajh/zorufetovodedazuw.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/hg52iiy/39331729197.pdfIn PDF document text
    • https://jozegolufipiz.weebly.com/uploads/1/3/0/7/130776065/4f937cc8cbe2.pdfIn PDF document text
    • http://emmetrix.net/vuxoboladiwetipope4h2p0.pdfIn PDF document text
    • http://farvestnn.ru/wibefopo7579q.pdfIn PDF document text
    • http://vienvozvrat.site/simile_metaphor_personification_hyperbole_worksheetyxhkm.pdfIn PDF document text
    • https://cdn.sqhk.co/jakabapewuv/miijegf/80362290850.pdfIn PDF document text
    • http://sosed.market/954486735549pbjt.pdfIn PDF document text
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/tezusutozamokapuduw.pdfIn PDF document text
    • https://luxoxika.weebly.com/uploads/1/3/4/8/134899107/5d5802d8.pdfIn PDF document text
    • https://cdn.sqhk.co/bepifopid/9hiRgca/molopufutizu.pdfIn PDF document text
    • https://cdn.sqhk.co/kuretunaba/herxhbx/vuriw.pdfIn PDF document text
    • https://cdn.sqhk.co/vedisaso/9hjPUge/18771281240.pdfIn PDF document text
    • https://cdn.sqhk.co/razefudixid/pRkhbxQ/55643125462.pdfIn PDF document text
    • http://pexiwaz.iblogger.org/adjectives_key_stage_2_worksheets.pdfIn PDF document text
    • http://karnaval.host/91118156058esthg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://susugafof.epizy.com/donifawilelesesaveviwigas.pdfIn PDF document text
    • http://xafamikipu.epizy.com/visilurodokurepivolu.pdfIn PDF document text
    • http://biforobajimebug.epizy.com/titufamasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c17e084c-7d89-4fc8-9379-7c7ab0aeea5e/fadatuwavetoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30bec425-5a74-4c9e-bf98-ddc5215bbc8f/88353044805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda1db2b-a7a3-4187-808e-b217ede5d4ba/is_omega_7_good_for_weight_loss.pdfIn PDF document text
    • http://kezaforow.epizy.com/backup_contatos_celular_android.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_off0000e90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90D 5164 bytes
SHA-256: 48ac195f417bff908e66bfb83596aa171bf4ec5335d22d46e204b9525ccf6456
font_01_sfnt_off0000fab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB5 10544 bytes
SHA-256: 0aec7a77948a7ee3ae9eecde528221f0171fd4d79da5e467f14f5613bac160d2

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