Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5e48c6acf2989e…

MALICIOUS

PDF

77.5 KB Created: 2021-03-22 21:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: faaa7f66af7d53758b124c506567525a SHA-1: 7659cd6516c2336d1da385a2f3592814061e7e87 SHA-256: 7e5e48c6acf2989e6601aafdd606021359d2a8202af3e15e621b3a28d8e2eac9
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a high number of embedded links, many of which point to known malicious redirectors or suspicious domains, indicating a phishing or malware distribution attempt. The heuristic firings, particularly 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'SE_LOLBIN_RUN_COMMAND', strongly suggest malicious intent. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://yafferge.ru/123?utm_term=improve+your+self+esteem+pdf In PDF document text
    • https://lupexepiw.weebly.com/uploads/1/3/4/3/134318885/mawipesuzevemo.pdfIn PDF document text
    • https://gebiralegesexi.weebly.com/uploads/1/3/0/8/130814020/5509420729.pdfIn macro / runtime command snippet
    • http://espaceabonnes.com/bi_monthly_budget_spreadsheet_freesiola.pdfIn PDF document text
    • http://shtampshop.ru/rarudiwirijakifagokoi3t8.pdfIn PDF document text
    • https://xowogibudul.weebly.com/uploads/1/3/4/4/134446034/gopugojudubujexomovi.pdfIn PDF document text
    • http://tafiwon.mywebcommunity.org/80951647989.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/84241398977.pdfIn PDF document text
    • http://tomandbxof.site/ikea_hemnes_8_drawer_dresser_organizern4uog.pdfIn PDF document text
    • https://xixasoxi.weebly.com/uploads/1/3/5/3/135324484/1813880.pdfIn PDF document text
    • https://wugebanog.weebly.com/uploads/1/3/4/7/134709888/4495053.pdfIn PDF document text
    • https://fujikoxeloto.weebly.com/uploads/1/3/5/3/135307408/dulodudixafobelolava.pdfIn PDF document text
    • http://avtovishki-msk.ru/show_some_important_full_formsib1u7.pdfIn PDF document text
    • https://fovokifijinibe.weebly.com/uploads/1/3/4/5/134582558/todiz.pdfIn PDF document text
    • https://kuvekimat.weebly.com/uploads/1/3/6/0/136052924/d88be227997.pdfIn PDF document text
    • https://lupexepiw.weebly.com/uploads/1In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luborinizu/rip_curl_watch_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/64389776929.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/how_much_weight_can_i_lose_on_dash_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23927562-959f-4d38-b8a0-03637ff1dd91/91652837125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd74bf4-d948-4a88-8569-4f88f8c4ec80/john_deere_345_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/holbrook_primary_school_ofsted_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446b9193-d732-4a02-befa-cacfa6cc822f/msi_a68hm-e33_v2_drivers_windows_7_64bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/957d4ec2-ef44-439c-bfae-2b84fb25b09b/36055922610.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_off0000f354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF354 5076 bytes
SHA-256: e9ede9ea1e44004121e11798ee937f275c881543019cbc4104a76c0b167cbed8
font_01_sfnt_off00010494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10494 10552 bytes
SHA-256: a0121858ef52705c1cf4eac5d3166382db9700b2e8ce365bbf07a57d7059e22f

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