Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42135af6a21d36b…

MALICIOUS

PDF

76.8 KB Created: 2021-04-19 03:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7f765e3ccf8693b85c2832ee7cf27b18 SHA-1: d9fd6544a8f5755db7fb5df59fa01b9c2899c197 SHA-256: e42135af6a21d36b20acd3359736520acf286bdee67a94531cdc00a27cf04f30
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://lozipotod.ru/strik?utm_term=what+environmental+ethics+mean PDF link annotation
    • http://jiwabozaxexe.mypressonline.com/95196192838.pdfIn PDF document text
    • http://rusherx.studio/what_god_says_about_feeling_lonelyk85a9.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/84006971237.pdfIn PDF document text
    • https://ledunadexaw.weebly.com/uploads/1/3/0/7/130775166/8372bf9234dad5e.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/fomenefir-tuzixuv.pdfIn PDF document text
    • https://cdn.sqhk.co/juvowisire/6ihjfMU/nhl_playoff_scores_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485714/normal_6011ee684c93e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444643/normal_5fe41b92a7e3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486763/normal_6063ab985b483.pdfIn PDF document text
    • http://pilevisuzo.iblogger.org/wordpress_redirects_to_homepage.pdfIn PDF document text
    • https://topalezomezo.weebly.com/uploads/1/3/4/3/134305389/gonil.pdfIn PDF document text
    • https://mogarujatokeduw.weebly.com/uploads/1/3/5/3/135324664/8f8b3f9.pdfIn PDF document text
    • https://nojijakifon.weebly.com/uploads/1/3/4/0/134012839/33203.pdfIn PDF document text
    • http://euroshopme.site/free_beetalk_old_version63577.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/jjhhZ2Y/65839054550.pdfIn PDF document text
    • http://verifybadgehelp.com/vodonovojezepuwirakipmz4cn.pdfIn PDF document text
    • http://taher-tcac.com/ipod_nano_3rd_generation_case_uk9y71n.pdfIn PDF document text
    • https://cdn.sqhk.co/nenutipu/hbCfUie/double_dragon_4_switch_cheats.pdfIn PDF document text
    • http://zisetevopazotaw.iblogger.org/abbreviated_new_drug_application_submission.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jatoxat.atwebpages.com/98761512458.pdfIn PDF document text
    • http://ditanumugagoma.myartsonline.com/38361581348.pdfIn PDF document text
    • http://mazogatu.epizy.com/keurig_2.0_cup_holder_parts_diagram.pdfIn PDF document text
    • http://sezifusina.epizy.com/lomepezakapake.pdfIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/blank_world_map_template_ks1.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_off0000f02f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02F 5112 bytes
SHA-256: a0525ec2c443a940e9c85e728398a865be895c509bd48db241cec26d8de144b7
font_01_sfnt_off0001017a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017A 10680 bytes
SHA-256: bf9dfc5348b03615cfc76eb928eb44cd0a54b325fe9d05256eba03dbb2974257

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