Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f709c622a4135a…

MALICIOUS

PDF

79.1 KB Created: 2021-04-03 17:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5e6f6d9098b023b8de26b6ef0ee48b11 SHA-1: d9e5d63b9fdad9facd696245a99d8e55746b2e31 SHA-256: 94f709c622a4135a5b0fc1f27f771a042ab37d8f345f588e62f51f8109439fc0
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://resalured.ru/wix?keyword=appointment+book+2020+target PDF link annotation
    • https://cdn.sqhk.co/vinikawikuve/T9ZjeM3/uber_mexico_oficinas_hamburgo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464530/normal_5fc9cc630b1d3.pdfIn PDF document text
    • https://cdn.sqhk.co/nomavunut/vjb4ine/the_shadow_sun_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_6062c013d6ba9.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/chapter_7_flame_cutting_quiz_answersse0w0.pdfIn PDF document text
    • http://sreda.city/16049138995h64k9.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/aibMjaz/download_real_cars_online_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463286/normal_601fa5bf885d1.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://uploads.strikinglycdn.com/files/443a6c30-5fc3-41f1-be91-4f669eb4598d/sufisorifobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2548daab-6caa-4698-a911-e19c7162844b/ielts_writing_sample_task_2_for_general.pdfIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_758d828d08c040e994db8e3d6209acd9.pdf?index=trueIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_7ece549affa74e13a07ee708ded42e70.pdf?index=trueIn PDF document text
    • https://ff536187-e25a-4bd2-965b-ff1113cf40b0.filesusr.com/ugd/bfcccc_9796b1f3f6cd4fc1a41d63231205638d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/566a6ce7-36d8-4b4c-a590-81becfd98d6f/dell_inspiron_570_16gb_ram.pdfIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_4c085804faa340829eed12608aa3de1f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d14c95f7-0651-44a0-9dae-36feadd57670/jugezufigewevazogagu.pdfIn PDF document text
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_da2963982c7346adaf435810b295832b.pdf?index=trueIn 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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE913 5184 bytes
SHA-256: 3a09666e00d5dc8a8b261c72fdc0cc1cac292c4d64a78d0c956dc3d509c7799b
font_01_sfnt_off0000fa8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8A 10960 bytes
SHA-256: 78bc8f8f583e31776ca519c332583680bcd2c067d4293a6dc3af944d8324bee0
font_02_sfnt_off00011fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCC 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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