Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb470657533f0da…

MALICIOUS

PDF

78.2 KB Created: 2021-05-08 03:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 91e471e15aa161f9ad2000c3bb75efe4 SHA-1: 4e3452c74e4674f9406ad932d2cfa3d747b20097 SHA-256: 1fb470657533f0da4433df13861d02051aaf57d33e92073c55a0e29432a8f585
234 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, specifically a 'Clipboard command execution lure' which instructs users to copy and paste content into a shell. The presence of numerous external links, many pointing to disposable hosting, further supports a malicious intent to redirect users to potentially harmful content or downloads. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/strik?utm_term=how+to+install+omnisphere+presets+mac PDF link annotation
    • https://zexirajeroluwub.weebly.com/uploads/1/3/4/8/134848753/b5ca793.pdfIn PDF document text
    • http://tophomework.space/17857896019y6duu.pdfIn PDF document text
    • http://lazadacostumercenter.com/1994_honda_accord_lx_fuel_pumpa594w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463792/normal_60662e5c3494e.pdfIn PDF document text
    • http://alisabor.design/cuentos_de_eva_luna_chapter_summary5xyah.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/8752799.pdfIn PDF document text
    • http://jadebey-x.com/stihl_fs_90_service_manualm2msq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454040/normal_601a42acdce33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412382/normal_5fed6dd4d8a12.pdfIn PDF document text
    • https://pizopivawot.weebly.com/uploads/1/3/5/3/135347149/lovabukesafafavo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_0c9eb287f0234d858f226846e477a810.pdf?index=trueIn PDF document text
    • https://b24182fa-1fee-416c-9f57-41d8a36573e1.filesusr.com/ugd/1cc367_c672dd8716144222ac04e517a33f41e7.pdf?index=trueIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_39bdc9db08184fcfb0989a568ad8f18b.pdf?index=trueIn PDF document text
    • http://jifusewu.epizy.com/merixowapudajenizotalufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acd8cf86-138b-4809-8451-78726956b77a/68333544510.pdfIn PDF document text
    • http://gisuxepu.rf.gd/pokukirixetudosuf.pdfIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_fe07834b36ec42b49efe63421db802ac.pdf?index=trueIn PDF document text
    • https://d787a32c-196b-4e99-9c98-3ae3c28023f9.filesusr.com/ugd/05b469_cab7abe8620f4c7a96f5f0770adcd727.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/df70f14e-0ed0-48a4-ae44-fcda8f29c65f/how_much_do_florida_foster_parents_get_paid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/637e85dc-8daf-4100-828c-eee635acee99/87880741118.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_off0000f18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18F 5224 bytes
SHA-256: 8c5bcfa8ccfddaa47978ba7b65de0c0b2bc0d4dac80637fd590f8adc8fd37262
font_01_sfnt_off00010335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10335 11792 bytes
SHA-256: ff63db9b0a8cedeb8c1c573bd64371bc5a470e885ecfba3d0ba6c979168f33df

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