Malicious PDF — malware analysis report

Static analysis result for SHA-256 c579c7f9b1883f25…

MALICIOUS

PDF

76.5 KB Created: 2021-05-16 19:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f3a0cc869b37d7bfd708255079229adc SHA-1: 262e0fc378a46ef482d82528d70f9ee003d663e0 SHA-256: c579c7f9b1883f256e5135ba6f25e99619f580ff78f3a3051a5de9f1a26cb3dd
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous external URIs, including one pointing to maypoin.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to downloading MP3s, aligning with the phishing nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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 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://maypoin.ru/strik?utm_term=les+miserables+ost+mp3+download PDF link annotation
    • http://nirenodeba.medianewsonline.com/saree_blouse_cutting_and_stitching_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/kerosumumato/c8ejjON/unterschied_business_model_canvas_lean_canvas.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/respiracion_aerobica_y_anaerobica.pdfIn PDF document text
    • https://cdn.sqhk.co/pisimebuziz/ejj2kfX/xixixovav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504870/normal_60278f7223c1d.pdfIn PDF document text
    • http://rivugijunamusi.mygamesonline.org/autodesk_autocad_2020_user_guide.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/46001145469.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/40203074520.pdfIn PDF document text
    • http://riwalimuj.scienceontheweb.net/tomilexezupo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450509/normal_600911fc3d7c8.pdfIn PDF document text
    • http://viwesisikumebi.getenjoyment.net/sociolinguistics_noun.pdfIn PDF document text
    • http://gojovujewinunuj.mygamesonline.org/12241613547.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/FRvjjSx/midway_united_methodist_church_kannapolis.pdfIn PDF document text
    • https://degugelusejife.weebly.com/uploads/1/3/2/6/132695568/kudemitiwulivu_zofokosejijute_pezimokizib_lekovipes.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/gUjgggj/lutagenotarozebasifem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412763/normal_5fcdf911d01f1.pdfIn PDF document text
    • http://fufejezonodim.mywebcommunity.org/did_the_wolf_of_wall_street_boat_sank.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412408/normal_5fe268bb5cc1b.pdfIn PDF document text
    • http://xokapik.mywebcommunity.org/daworazir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417129/normal_60590cc7070cc.pdfIn PDF document text
    • https://cdn.sqhk.co/kekoseni/gfhczfT/miromine.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/futifegu-wagixaxugof-xakevojagemudop.pdfIn PDF document text
    • https://kusajigoma.weebly.com/uploads/1/3/6/0/136036420/dozububebuferodej.pdfIn PDF document text
    • https://gadipofonikiw.weebly.com/uploads/1/3/4/3/134390141/e1221dc05c0d06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xologikaju.atwebpages.com/xizazisepujidapobunuzon.pdfIn PDF document text
    • http://nemenarubaz.atwebpages.com/71795508223.pdfIn PDF document text
    • http://pajupevezujugut.atwebpages.com/ainsi_parlait_zarathoustra_gratuit.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_off0000e893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE893 5444 bytes
SHA-256: 97565c58a0a2ff27ce88105f1e568f2bcf38232f8948a403498e197308e37a51
font_01_sfnt_off0000fb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 12488 bytes
SHA-256: 0c7fdccf93aab78518cf94e536d10c2371018457dc6f296831b05a63435eab2c