Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ccc6482e30bc13…

MALICIOUS

PDF

82.8 KB Created: 2021-03-07 06:29:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9f469d0a67d2ab5e67b4f621d52f1b6d SHA-1: f14365120f8e867db97844012dd50ac8283e346d SHA-256: 20ccc6482e30bc138851efab8d3add44de327caa2b4cd84c75b40992bbea0c75
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with heuristics indicating it's a link farm hosted on disposable domains. ClamAV and ML classifiers strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/wix?keyword=mitp+summer+school+2016 PDF link annotation
    • http://siwosupegejolop.medianewsonline.com/77766266218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468267/normal_600c1a87daf89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502833/normal_60441417ced40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463552/normal_5fde22b7f0477.pdfIn PDF document text
    • http://joritirumag.mypressonline.com/torah_holy_book_in_english.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/jvc_vhs_camcorder_tapes.pdfIn PDF document text
    • http://autoupgrade.website/21308228780wxeix.pdfIn PDF document text
    • http://nakotigolajeg.scienceontheweb.net/46364677401.pdfIn PDF document text
    • http://uscovidcharts.com/irregular_verbs_list_z_tumaczeniemanrha.pdfIn PDF document text
    • http://fejiximodanu.mygamesonline.org/bluedio_t2_plus_turbine_wireless_bluetooth_headphones.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/ong_orality_and_literacy_summary.pdfIn PDF document text
    • http://trujillostacoshop.com/any_further_information_to_support_your_application07ekw.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/how_to_find_density_of_air_pressure.pdfIn PDF document text
    • http://tixivepemom.22web.org/25309151214.pdfIn PDF document text
    • http://reduslim-italy.site/dafagubiseposipenxmnrs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450876/normal_5ffb81ff68d3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_ae731908f4d9470a9556678d86a342ba.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_0aa1c7ba3528490f8086e1117f80f26a.pdf?index=trueIn PDF document text
    • http://bozumux.epizy.com/talomiluzasijuriwu.pdfIn PDF document text
    • http://xizanisud.epizy.com/83183366765.pdfIn PDF document text
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_8953b2609ce94b5ebf3cf9754626d827.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA55 9684 bytes
SHA-256: cc38ec5c0f5c6de25d72c7fae38edb7e9cc6e40b4c36deeee6c891cd26831109
font_01_sfnt_off0000fa4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4B 5448 bytes
SHA-256: 4983f14511d5dc4d1e8bc613884e310ab270598b4444ef4a8b565ddde96389c2
font_02_sfnt_off00010cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC0 15900 bytes
SHA-256: 1ee58c167ecc489fc4248e26d5072cfd93a64158864f85831c812b9e6770170f

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