Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb426839a7f76f54…

MALICIOUS

PDF

68.1 KB Created: 2021-02-22 22:11:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 02e5eaf07da8378b16549c2a6ad371e2 SHA-1: 96b1b13afc12544f85076a4baeeb0de60716ebca SHA-256: eb426839a7f76f545096a74a9069b6f27d35e9a50b8305cf40f0b50ff7270da4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=compro+carros+usados+rj'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is a high-priority indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://crophysi.ru/wix?keyword=compro+carros+usados+rj In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_601b162953b64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418184/normal_5fcdee72c7ace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402000/normal_5fd628340b810.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/tgfsPrQ/ziwalugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479435/normal_5fcb7233cf0d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458628/normal_5feef1322e9f7.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/tcLEjcy/tovizepigilenewasawo.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/BgfgjYf/xeligimasijevejasafumolik.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/ixL587k/vifot.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/jivala/87869162038.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/xukema.pdfIn PDF document text
    • http://fogosise.rf.gd/oxford_business_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/89911043724.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/8417448620.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/40581698248.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/kimogewilopovilewoteturil.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/colorado_state_fair_livestock_entry_forms.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_off0000c953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC953 5168 bytes
SHA-256: a0c15629c10856edb3bc07dd4823ad8046aa9f72db051cdc51d1416f07f2b3c7
font_01_sfnt_off0000dac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC7 12840 bytes
SHA-256: f1781665db6d30db5487b33201f854fdc64f7deb3f313c0a02b1674c9cd23a51

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