Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3ed3c104a82246…

MALICIOUS

PDF

75.6 KB Created: 2021-02-17 03:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 795044c4703ede864ff7f018436bfede SHA-1: 229d8169e2a3c0c17bb4654bae23bffe8300f36a SHA-256: ad3ed3c104a82246864bea846e9b27d7dc8624b4aaa2359dc7f5be54f8bdc30e
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Weebly-hosted PDFs, suggesting a link farm designed for SEO manipulation or to distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious workflow, potentially involving JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • 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://bologen.ru/wix?keyword=dragon+ball+z+mini+warriors+mod+apk
    • https://jelugofinetala.weebly.com/uploads/1/3/5/3/135389066/lepekujawuwe.pdf
    • http://livecopyrightverification.com/zigubezaworibuvhldnb.pdf
    • https://mozeduxazos.weebly.com/uploads/1/3/4/0/134018133/6222586.pdf
    • http://subbellassecret.com/follow_up_interview_letter_templateq6swl.pdf
    • http://fotogodopuxet.iblogger.org/48165693743.pdf
    • https://letavozogat.weebly.com/uploads/1/3/5/9/135978758/7384606.pdf
    • https://cdn.sqhk.co/xuwadezab/vtO8ha2/legendary_stuntman_run_apk_download.pdf
    • https://bolubevegu.weebly.com/uploads/1/3/1/4/131454373/vedefujifafenavofako.pdf
    • http://katermore.ru/adjektivdeklination_komparativ_und_superlativ25u7a.pdf
    • https://kurinasuvofete.weebly.com/uploads/1/3/5/3/135334761/dupas.pdf
    • https://kavejujutafen.weebly.com/uploads/1/3/6/0/136022690/4b2ac4.pdf
    • https://cdn.sqhk.co/vupapevixu/ifjgjg4/92200178106.pdf
    • https://xutifapob.weebly.com/uploads/1/3/2/7/132712150/waporaxazix_numafitadimim.pdf
    • https://cdn.sqhk.co/rekosiseweno/TjjyEwn/zupexavufudegurapup.pdf
    • https://pofexetebi.weebly.com/uploads/1/3/4/5/134592759/e41305440934.pdf
    • http://calipshatngaccs1.xyz/tizilawifigekisidexuxifqeodh.pdf
    • http://vezapom.iblogger.org/suxuroduji.pdf
    • http://bapupozizevose.22web.org/taburebisabizaviluzowowo.pdf
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/zodorenawifale_goxigipek.pdf
    • https://cdn.sqhk.co/togareguko/gR3haEA/globe_load_promo_for_one_month.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dulubuli.rf.gd/google_chrome_for_pc_xp.pdf
    • 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_off0000eb8b.bin
f672df4997fcfdb7ef7644e2b5147cea07d06ae36d7b98e1abe789b62a81ad10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8B 5624 bytes
font_01_sfnt_off0000feb0.bin
7c7f90fc8972b5f5e0f422171ae4655151711a577bf8953856de7cb3beb967a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 10016 bytes

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