Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec4a90c0a9e39dc…

MALICIOUS

PDF

61.3 KB Created: 2021-02-21 02:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2a314f2f534c61cba7d5ed9a6a7aa06c SHA-1: 2dc7418a8272da92477bff9cfa1097e7b3a720d1 SHA-256: 9ec4a90c0a9e39dcb572a779adc1d63411d7b04d1f01b8683d8888121bb2e5b8
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://leonvi.ru/strik?utm_term=which+monitor+brand+is+best PDF link annotation
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/1e83f359504fe4.pdfIn PDF document text
    • https://tiforunu.weebly.com/uploads/1/3/1/4/131437018/firatirosepo_wesew_mudud.pdfIn PDF document text
    • https://dudunetexuzo.weebly.com/uploads/1/3/1/3/131379759/4243727.pdfIn PDF document text
    • http://rabuvuz.iblogger.org/parubomibabodebofevapu.pdfIn PDF document text
    • https://rofajubufilotol.weebly.com/uploads/1/3/1/3/131384128/wodadesoxujo.pdfIn PDF document text
    • http://damodudajipofem.22web.org/39252489970.pdfIn PDF document text
    • https://guwosifewutus.weebly.com/uploads/1/3/4/6/134616196/zesurelowavopij.pdfIn PDF document text
    • https://nebenumepidenok.weebly.com/uploads/1/3/5/3/135307723/23cf77a2f78.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xajokaxakubif.rf.gd/nutosu.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/photoshop_for_windows_10._exe.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/hdfc_securities_ipo_form.pdfIn PDF document text
    • http://goguvero.epizy.com/girabowigokiguvono.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/55848268240.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/black_chin_hunting_guide_osrs.pdfIn PDF document text
    • http://ruvowepager.epizy.com/sovilizemogasuz.pdfIn PDF document text
    • http://tufifuxuruwat.rf.gd/63010738226.pdfIn PDF document text
    • http://gukupexokopiwug.epizy.com/50626512770.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6E0 5300 bytes
SHA-256: b3406151468350c9f49f391f32129712f185df0fc42d0ed65e1afaae5ed5ba4f
font_01_sfnt_off0000c8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C2 9264 bytes
SHA-256: 540d6998c26e73358b13733c41f0f64497e5c99f2bcd005f41f35c7e8576058c

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