Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad15e5aa33b4e9d…

MALICIOUS

PDF

79.7 KB Created: 2021-04-09 04:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3ffcec8b153b4f7961aa68b14a765b3e SHA-1: 361ba58cece5bb5d5e81856bc70f591b4608d7e6 SHA-256: bad15e5aa33b4e9d94e610f65e0a1d9fdca982412449f5a94b2f0b62c8cc9360
186 Risk Score

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://midufefew.ru/strik?utm_term=how+to+write+a+poetry+book+in+word PDF link annotation
    • http://silkhfig.bid/nonuzosopd1oh.pdfIn PDF document text
    • http://spainsale.pro/76208481040hdei2.pdfIn PDF document text
    • http://study-english-02.space/67261773315mebx8.pdfIn PDF document text
    • https://cdn.sqhk.co/gitaligido/6v1HRhg/best_tuner_for_5._3_silverado_2018.pdfIn PDF document text
    • https://finamiwowekizo.weebly.com/uploads/1/3/2/3/132302732/4413843.pdfIn PDF document text
    • https://jenejipita.weebly.com/uploads/1/3/4/4/134473981/2cde9f8.pdfIn PDF document text
    • http://itawegan.space/nuxopirenuxe4xuk1.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/jahduib/okc_thunder_head_coach_news.pdfIn PDF document text
    • http://rukozhop-guide.com/how_to_make_your_home_more_insulatede4ite.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/bizavis_vejaxuka.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/cjDibBQ/9_months_pregnancy_meme.pdfIn PDF document text
    • https://gasodugolulo.weebly.com/uploads/1/3/4/3/134375537/1a7296e0b5b9a5.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/tetisaginasesoloriwudakel.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/hXhfehh/pinout_for_gigabit_ethernet_cable.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/aiehdjc/i_swear_to_god_meaning_in_urdu.pdfIn PDF document text
    • https://bumilumijoxaxuv.weebly.com/uploads/1/3/4/4/134497753/zikoduvinulonubupo.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/AghVfhg/jowawudi.pdfIn PDF document text
    • https://cdn.sqhk.co/vigomuraguf/uVAzxhb/busomovuzetevazopo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/speed_test_apk_premium.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/bssc_graduate_level_notification.pdfIn PDF document text
    • http://tosipasakuvil.myartsonline.com/34569262127.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/sas_do_over_numeric.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/quinny_buzz_user_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74B 5104 bytes
SHA-256: 3e74905d1490fa35279dae543d957c51c01d578a56c9e4cd8f7dbf07725c19a4
font_01_sfnt_off000108c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C4 11988 bytes
SHA-256: d3aa422d5f11ee5154dd3b18ea4c1ae071a6c27b81e84d6895cc5af70cba778b

Open this report in the interactive analyzer, or submit your own file for analysis.