Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9fd6409154b09c2…

MALICIOUS

PDF

75.9 KB Created: 2021-03-24 00:06:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 90fa6475ec53417593bd61b3c4d52aba SHA-1: e5187746638013d2b907967acd47dafd614ba14b SHA-256: c9fd6409154b09c2d0445a82e1ee3c09ea42f6ceebc47ef044a1d1ee509cde38
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to suspicious domains, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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/award?keyword=glencoe+algebra+1+answers+pdf PDF link annotation
    • https://milakixu.weebly.com/uploads/1/3/1/4/131483020/6166591.pdfIn PDF document text
    • http://hookup673.site/kiki_s_delivery_service_sheet_music_orchestrayj54d.pdfIn PDF document text
    • https://tabowemonikose.weebly.com/uploads/1/3/5/9/135957185/muganimapilavibagivu.pdfIn PDF document text
    • http://fullstacket.online/316809982301ua16.pdfIn PDF document text
    • http://hookup753.fun/the_river_styx_ferrymanbl0q2.pdfIn PDF document text
    • http://health-top.ru/81688283921xelia.pdfIn PDF document text
    • http://milanomoda-italy.website/priesthood_endorsement_form1lpn4.pdfIn PDF document text
    • https://tipipiteker.weebly.com/uploads/1/3/0/7/130775441/mejimin.pdfIn PDF document text
    • http://itwow.info/puwirevusolilogexopi7so7x.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/zijivevip/xuwirovaki.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/bajafit.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/capacitores_en_paralelo_ejercicios_resueltos.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/cube_world_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/99741726492.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/69273039228.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_540d865180ec45b399b3b9e97ffa6cfb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luropiw/omr_answer_sheet_format.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/answering_service_jobs_from_home_nj.pdfIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_175dfb68a75044da818a76cfbf36e6e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juduk/4067287100.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_off0000ebd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD6 5640 bytes
SHA-256: 833fc567009af3f779d4b62fd12d99ade1e111c4620b9b6e11030804e700b8b1
font_01_sfnt_off0000ff31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF31 10440 bytes
SHA-256: f1c62f9f52805a9e9eef94a49168d95676c539bb573077ca70e0f7db496dc116

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