Malicious PDF — malware analysis report

Static analysis result for SHA-256 457e2e7f73b9e6eb…

MALICIOUS

PDF

80.8 KB Created: 2021-03-24 22:28:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fa4bca2fead92d1867bf9ea91365d7c4 SHA-1: b6bba181a3f596adacbf6e66d8bb22f379c0ce3d SHA-256: 457e2e7f73b9e6eb4c9e92437f56fcfa7bf452c8c3787dbf75e996f9d7d5d56a
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the document's structure point towards a phishing or scam attempt designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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 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://golowaki.ru/strik?utm_term=best+cordless+leaf+blower+vacuum+australia PDF link annotation
    • https://fijuzezakuxulow.weebly.com/uploads/1/3/5/3/135391315/dunuxatowap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501356/normal_5fc7c81bd64c1.pdfIn PDF document text
    • https://cdn.sqhk.co/gagupibi/Y0Eogjg/divodevizupatakiwe.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/BAjjYPJ/galudun.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/jd203ha/39699983898.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/geVihOM/national_anthem_of_finland_chords_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/fNk6qTX/skylanders_trap_team_ps4_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382413/normal_5ffe41755daf3.pdfIn PDF document text
    • https://cdn.sqhk.co/dojatejij/ig7cMgd/3888707176.pdfIn PDF document text
    • https://cdn.sqhk.co/rorifugera/gcm7ghJ/spacex_starhopper_live_feed.pdfIn PDF document text
    • https://zumonula.weebly.com/uploads/1/3/5/3/135323502/wivefu-jabofeza.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/Dqz6Bja/58755828163.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/hbWuhe6/legodolusemenorevox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423145/normal_600758947764d.pdfIn PDF document text
    • https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/paxilim.pdfIn PDF document text
    • https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/wagapabeti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_6057e2ad9de17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_603d390ce6b44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_3b9b6f8118534a1680e999342a080f8d.pdf?index=trueIn PDF document text
    • https://42cc6f6d-9125-48bc-bce4-1bf15f49b1be.filesusr.com/ugd/7c30af_7986b4d3143d4da1bdf98b8f46a7a319.pdf?index=trueIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_edd02579d7624659aa1266eb339bb19e.pdf?index=trueIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_650d438b882b43b39622948e8405c29c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/popilo/southeast_asia_culture_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/wokaxotorenadeximelopir.pdfIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_6c1a327e938c4f5e9b8d84897cd8372e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/competitions_guide_com_au_login.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_off0000fce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE7 5508 bytes
SHA-256: d6ea7115bbe82543bd6aa4eb6ccdc732d0022bd741149dfde9e1d6b9f981fc87
font_01_sfnt_off00010fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA9 11116 bytes
SHA-256: 229f4da36df10f59981d39cf0f9d630d1010d35498cb44e2904506c93930d3f1