Malicious PDF — malware analysis report

Static analysis result for SHA-256 c444b2e352537482…

MALICIOUS

PDF

101.4 KB Created: 2021-04-21 08:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1c47feaf3afa2eaa9ca42348835c805e SHA-1: 49d1ae5f815b2e7b6f595964f8da870f64e7b570 SHA-256: c444b2e3525374820738bd1035b73e6a8bea591dc3b5cb4f36ef3af14a859e60
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, which is characteristic of SEO link farm abuse for distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=list+of+irregular+english+verbs+past+tense PDF link annotation
    • http://vukuwupevipe.iblogger.org/beautiful_disaster_jamie_mcguire_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/lRhdpj5/battle_in_seattle_movie_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/HAyVha3/carrot_cake_recipe_easy_simple.pdfIn PDF document text
    • https://vajipexinonadol.weebly.com/uploads/1/3/4/0/134096003/pugimarud.pdfIn PDF document text
    • https://kuzapulekoxiror.weebly.com/uploads/1/3/2/6/132681507/kixerijodukawugajoju.pdfIn PDF document text
    • https://zegadakupoxak.weebly.com/uploads/1/3/4/7/134749069/3492510.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/nuxejudunivapufi.pdfIn PDF document text
    • http://rojenugilin.22web.org/24747441681.pdfIn PDF document text
    • https://cdn.sqhk.co/kenixidoxexi/ggqijAx/bimaruketubuzugok.pdfIn PDF document text
    • http://defumemijiwof.22web.org/modello_ritenuta_d_acconto.pdfIn PDF document text
    • https://rifivubego.weebly.com/uploads/1/3/1/4/131407021/zunoruxumafoki-mofaf-danisaluzufud-bavutevire.pdfIn PDF document text
    • https://cdn.sqhk.co/zutujodara/9oJGSih/pixel_dungeon_games.pdfIn PDF document text
    • https://zitudoxe.weebly.com/uploads/1/3/1/4/131437236/newob-gizubonot.pdfIn PDF document text
    • https://jumitugiputetiv.weebly.com/uploads/1/3/5/3/135313018/388620.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/lawakux/gusotamodozabesapiwawib.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/mackie_control_universal.pdfIn PDF document text
    • http://fusifovizit.rf.gd/25482274389.pdfIn PDF document text
    • http://betelenederope.epizy.com/white_platform_sneakers_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/komuzukosisukivewajet.pdfIn PDF document text
    • http://tuxefefili.epizy.com/structural_adjustment_programmes_in_zambia.pdfIn PDF document text
    • http://davepizu.rf.gd/91485668236.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_off000149d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D7 5304 bytes
SHA-256: 49df28ab5e1b683e8594798c003e21aa19ca1d9fa7e66544dfc97a75aca8659b
font_01_sfnt_off00015bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BEA 12444 bytes
SHA-256: e2db1e7df863a76e542f4964260ab09885303a0084c026243b5e0808f3d78592

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