Malicious PDF — malware analysis report

Static analysis result for SHA-256 eecb67e9a94ba891…

MALICIOUS

PDF

84.4 KB Created: 2021-04-05 17:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 316939f90e79a46fbbedb1a56ba33429 SHA-1: 284a6b7d9cffaead50ccefd85399e0a167546bc8 SHA-256: eecb67e9a94ba891ea9484e53680a69cefd400fd1cc9829f1f3752f5440dbfac
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://xezojetit.ru/123?utm_term=dress+up+worksheets+for+preschoolers PDF link annotation
    • http://manthoughtswebsite.website/zulowitowovixozadimaky8pa9.pdfIn PDF document text
    • http://womumonafip.22web.org/relufimobudotogeduv.pdfIn PDF document text
    • http://kutakelipaxeb.22web.org/c_b_i_shankar_songs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_602128cab53ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369927/normal_600077c5e3b95.pdfIn PDF document text
    • http://judozine.iblogger.org/happy_birthday_cake_photos_with_name.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445573/normal_6000f0561917a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414687/normal_600f656e6a30a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456166/normal_5fd34f2cd82fa.pdfIn PDF document text
    • http://phrensy.co/bloody_roar_primal_fury_ps2nn96z.pdfIn PDF document text
    • http://ionatr.fun/mivopuvezl0pip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477913/normal_6040effd09e8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454301/normal_5fc6ac7d44b09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_aab732ab48374329800b8324aa81d669.pdf?index=trueIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_cd8570e36cf046fc824cc01c2b786e21.pdf?index=trueIn PDF document text
    • http://goguvero.epizy.com/car_audio_amplifier_repair_tutorial.pdfIn PDF document text
    • http://bapujuta.epizy.com/agatha_christie_movies_2019.pdfIn PDF document text
    • http://vulitogegitutop.rf.gd/82141258987.pdfIn PDF document text
    • http://gugoxoxopuza.epizy.com/barron_s_ielts_practice_exams_free.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE669 5048 bytes
SHA-256: 8a9724cfb7663d4b9e3ac5d67337035ba4c37c83d17d49ee5a8983b2c01638a9
font_01_sfnt_off0000f7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AC 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0001003a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003A 11064 bytes
SHA-256: 4d42fea880a7dbe306fa1cd7bc0cf97c195da3fa2d42f0ad977b8d3d8235a9a2
font_03_sfnt_off0001268f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268F 9044 bytes
SHA-256: 7d74f8091e8cc13e12e921ff6b35ad0f2070a04d778a7c30834bef9449d59b14

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