Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e07ca7ca9841e2…

MALICIOUS

PDF

81.3 KB Created: 2021-04-01 09:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b7040c863c3837a8349df7984c0ac93d SHA-1: 66d95932a09a508878ffcabbc13eaed7aed8e0e9 SHA-256: 18e07ca7ca9841e2e4db125fbcfc121b0f7e9966d496b9de408f1c7cd8815b9c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://midufefew.ru/wix?keyword=singer+inspiration+manual+pdf PDF link annotation
    • http://csxmoney.info/zodofqqval.pdfIn PDF document text
    • http://nnorm-id.com/6669031466nks8v.pdfIn PDF document text
    • http://tufezoba.22web.org/bosch_integrated_dishwasher_door_template.pdfIn PDF document text
    • http://org-fruit.space/43892906530oqdjg.pdfIn PDF document text
    • http://goodsun.fun/vusemaw4dva.pdfIn PDF document text
    • http://grizhoff.ru/how_to_get_married_in_the_caribbean41rh0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_c07b659cc85641e5aa0cad0e8dfe1382.pdf?index=trueIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_95fb691d2e0648109613324bcfbcf37e.pdf?index=trueIn PDF document text
    • https://22fea36a-5e19-4af1-b4aa-fe6e1efe0ee9.filesusr.com/ugd/b5a188_ebe9f46fb069407a8eb7f35803f66f64.pdf?index=trueIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_f58e0d04cf0d4a2b86c2fc59edb201ba.pdf?index=trueIn PDF document text
    • http://kejarajavamoge.epizy.com/pogoxezixinativojivutuno.pdfIn PDF document text
    • http://zazufazujinuzo.rf.gd/gmail_bypass_apk_for_android_free.pdfIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_2772ff6da04045919ba45d5777ea7dda.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f52859f-e4ea-4824-9fb4-b1588817ba98/ezdrummer_2_free_download_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9231747b-c29d-41a9-993e-e039367ddf64/best_outdoor_motion_sensor_flood_lights_uk.pdfIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_1f5238610c8847c8af7f47d4f721794b.pdf?index=trueIn PDF document text
    • https://1580f21e-fc75-4350-9669-3be8b7525729.filesusr.com/ugd/eff6cf_247f73cebab9413583621f7e006d692e.pdf?index=trueIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_62103f4ff9a04bc5b9fb5035ac6f67f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6a06cf-861a-4a47-8957-2e0b01201ed0/mirowosesu.pdfIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_6e78ef2412a441e7af5a776b7468c92d.pdf?index=trueIn PDF document text
    • https://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_ac3f6657d37c4ab6bbaddcb09f7ed164.pdf?index=trueIn PDF document text
    • http://fuzaxovojige.epizy.com/momumesak.pdfIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_3b73912b7a8841a584a94811d91e4328.pdf?index=trueIn PDF document text
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_6526e15e26404302b68c15639e9b50eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54d2d32d-f7c9-425b-9fee-435d3d37e40f/89313238511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9409e3cb-13e5-4acc-ab34-66f34c5145b5/voxifebizisutojax.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25F 5348 bytes
SHA-256: 5bc7c72aa2243045f76411146e0e468c7c6d55c3293f4f81e684e8b52ad4356b
font_01_sfnt_off00010469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10469 10920 bytes
SHA-256: 4c1dfdfa65d615219fdf020509e5e971a3ac78977c3d1024f3a7303ad9d12239
font_02_sfnt_off00012980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12980 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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