Malicious PDF — malware analysis report

Static analysis result for SHA-256 2103f8987b14bbfa…

MALICIOUS

PDF

77.6 KB Created: 2021-04-04 23:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9f3bc3660f2bd040882e6924e14fe2f SHA-1: 2dbc0f687a2a8a707b9801548f2a2c834e2f02f7 SHA-256: 2103f8987b14bbfa40ba2aaf571fbe82d2e8f33b0603b89d7eec0ee6bc399b05
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a mass of external links, many pointing to PDF files, suggesting a link farm or SEO spam tactic to distribute malicious content. One of the primary URLs extracted is 'https://soxebez.ru/wix?keyword=six+secret+teachings+book+pdf', which appears to be a lure to a website that likely hosts further malicious payloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/wix?keyword=six+secret+teachings+book+pdf
    • https://cdn.sqhk.co/ronutalin/vhgON4h/jiwupikisowe.pdf
    • https://cdn-cms.f-static.net/uploads/4389394/normal_601edde6a57e2.pdf
    • https://xesevurodat.weebly.com/uploads/1/3/0/9/130968943/1228109.pdf
    • http://usecabinets.xyz/247597923633sz5o.pdf
    • https://static.s123-cdn-static.com/uploads/4414339/normal_5ff35ebcc1889.pdf
    • https://cdn-cms.f-static.net/uploads/4367665/normal_601bb0593f0f2.pdf
    • http://lnstagramverifiedsbadgeform.com/dirt_devil_spot_scrubber_instructions6g4w7.pdf
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/zokorurafoxovin.pdf
    • https://cdn.sqhk.co/numovasovev/jcrhdge/samujumuzuzame.pdf
    • https://cdn.sqhk.co/gafisasiwu/9q9fDL6/best_tuner_for_6._7_powerstroke_2016.pdf
    • http://cmbespaceclient.xyz/how_to_improve_piriformis_syndrome0t0xq.pdf
    • http://dle-tpl.site/older_download_mp3nnyh3.pdf
    • https://cdn-cms.f-static.net/uploads/4390996/normal_60522bc3902a2.pdf
    • https://cdn.sqhk.co/bezifowo/Bhjifgf/hacer_manualidades_con_cartones_de_leche.pdf
    • https://cdn.sqhk.co/xivudebisov/eYgh3xx/migufufejeba.pdf
    • http://podarokinsta.site/93345951532jo64w.pdf
    • http://filanion.online/855829225515pgp7.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://abf133a7-37c0-4616-b653-d99fd306bce3.filesusr.com/ugd/5c8236_2c6c17bc3403492ca74b7b7b84999a71.pdf?index=true
    • https://f3dc8d0a-397f-4303-99a5-a7927e83d850.filesusr.com/ugd/e916cf_62e18dbfc8c24e5fb56c3f289ee652ba.pdf?index=true
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_98f5e4d22fb0415e961bf6c512c79690.pdf?index=true
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_1030aaaa7d2f45cc962233df9a469969.pdf?index=true
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_ae4e2bc92a9548289d8fbbbbd706ac50.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ef.bin
cd799240eb67be8df66954f2d99bc9636c1baa188532a39d8c6226f4e6ca4bef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EF 5760 bytes
font_01_sfnt_off00010486.bin
91e81285eb4f86f01a895c20b92657346d7fd26d788bc85fda4258a406ce78dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10486 10688 bytes

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