Malicious PDF — malware analysis report

Static analysis result for SHA-256 0090290716757eac…

MALICIOUS

PDF

79.5 KB Created: 2021-03-01 20:19:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f5d9e7c184e867e390562f2b3c6ce3bd SHA-1: ddcd4bad8ffb6f6c53437d8cfdd08d3cef7215f0 SHA-256: 0090290716757eac37cb028a65079e764e54390e16ebfa81f566bdd2f22a6913
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a known malicious redirector. The heuristic firings indicate a link farm and a critical ClamAV detection for a phishing trojan. The document body, though heavily obfuscated, contains text related to a Samsung Galaxy S9, suggesting a lure to a potentially fraudulent offer or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/award?keyword=samsung+galaxy+s9+weight In PDF document text
    • https://cdn.sqhk.co/jimevexir/hghjie2/pasofutorisuselufiwuma.pdfIn PDF document text
    • http://totalcreditreport.info/acid_and_base_ph_phet_lab_answerstgx29.pdfIn PDF document text
    • http://prosucre.pro/337346977871g25t.pdfIn PDF document text
    • http://stickerrus.ru/video_er_ios_6._1._6bmj0e.pdfIn PDF document text
    • https://silatasetexa.weebly.com/uploads/1/3/1/6/131637876/sorasejemi.pdfIn PDF document text
    • http://kamini33.ru/gumim3jesn.pdfIn PDF document text
    • https://cdn.sqhk.co/gojelonub/iahdjjY/71131717462.pdfIn PDF document text
    • http://securityverifiedservices.com/11357084447w151f.pdfIn PDF document text
    • http://topshops.website/parrot_mki9200_remote002pe.pdfIn PDF document text
    • https://kibepujuvug.weebly.com/uploads/1/3/4/6/134644113/7752814.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/90905810107.pdfIn PDF document text
    • https://dubitofux.weebly.com/uploads/1/3/4/4/134458445/d9431fa5309c4.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/sinadi/bobebepodawusesed.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/tor_browser_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/mhw_charge_blade_guide_xbox.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/godulusovuwasolafukovevip.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_off0000fa7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7C 5524 bytes
SHA-256: c1a1862e5771e99c1bc0c21fb100c43f7ad910fbf7e571aad8eb0bdf03965e4d
font_01_sfnt_off00010d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D38 10428 bytes
SHA-256: 6b6948761e387f72e2bd435fb0fb18df7e8e9d8cf70304da69070c06542fd992

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