Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19f9b39f208ff2b…

MALICIOUS

PDF

72.7 KB Created: 2020-12-22 20:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2d2920219f449cb2a4a0a33c10a9fa28 SHA-1: d9d3d98a65320271a96b97b4b4cab9576adc0856 SHA-256: e19f9b39f208ff2b4031eae80d25d4d0fd80595e014e66543b546f4adabd61d7
214 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs suggest an attempt to direct users to potentially harmful sites, possibly for phishing or to distribute further malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=apple+valley+utah+weather+averages In PDF document text
    • https://bonujuvab.weebly.com/uploads/1/3/2/7/132740321/girowuzibasi-kolulowometepuv-sopuguxipujir.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/boveluneke.pdfIn PDF document text
    • https://vigejudekoseja.weebly.com/uploads/1/3/4/5/134518300/xuvataduwim_tegituturo_xiradev_tojufixojigu.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/06b579b6c730.pdfIn PDF document text
    • https://karegito.weebly.com/uploads/1/3/4/6/134626514/53164f5e7.pdfIn PDF document text
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/tejijovaramamol.pdfIn PDF document text
    • https://fisabovetusita.weebly.com/uploads/1/3/4/5/134597566/3998749.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/nedijowewoded/aba_english_premium_apk_full.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/duke_energy_power_outage_report_line.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/41544064774.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/rarojiwilojivibimejurevo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc796d4a3ccef3526ec4c2b/t/5fcd133605ddc9599d27479b/1607275321824/86066940268.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc553500b6b03258f52b7d8/t/5fc69bf6f8cdb769c6cba977/1606851575207/62240818923.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_off0000de77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE77 5324 bytes
SHA-256: c0d42934d19f966e475efdf5107c8154fcd67f43071b83aa59c023bdab5e7af6
font_01_sfnt_off0000f0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AD 10948 bytes
SHA-256: 1573e3d38a84d9e788942396ba59f957654d591771553000e23cb212a879e411

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