Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70ba1e1fbd97b95…

MALICIOUS

PDF

70.4 KB Created: 2021-02-22 19:06:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: fd6314b5812fa7b7b7e86e8b967aa4c7 SHA-1: 4dda961b991f87fc68229cd9db121c8547643d73 SHA-256: d70ba1e1fbd97b95da30c80c878899e85e7924c5ce645eecc25f3e9ffd0e7724
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a link to a known malicious redirector, 'https://crophysi.ru/123?utm_term=national+mall+google+maps', which likely serves as a lure to a phishing or malware distribution site. The embedded URLs and the overall nature of the heuristics suggest a phishing or credential harvesting attempt.

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/123?utm_term=national+mall+google+maps In PDF document text
    • https://static.s123-cdn-static.com/uploads/4416154/normal_5fdf32e63e829.pdfIn PDF document text
    • http://universityru.fun/the_66_laws_of_the_illuminati_secrets_of_successujj82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_602eb80582962.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426090/normal_5fcd7f8b4d820.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374536/normal_60044b3938133.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421042/normal_5fdd5c6d398dd.pdfIn PDF document text
    • http://okclub.org/score_s_business_plan_template_for_startupsp14hp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494136/normal_5fe0359790281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_6024718b09a8b.pdfIn PDF document text
    • https://cdn.sqhk.co/faxinomitux/iddjeTE/emoji_craft_kits.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376101/normal_60061f21707fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450506/normal_5fee65815b1a3.pdfIn PDF document text
    • https://cdn.sqhk.co/fifenije/hd6YeVB/nostalgia_electrics_coffee_maker_not_working.pdfIn PDF document text
    • http://dwatches.site/bbc_news_reporter_scriptlnm7d.pdfIn PDF document text
    • http://voseboler.iblogger.org/eglinton_public_school_uniform.pdfIn PDF document text
    • http://donbetosstreettacos.com/boriwuzojoxujepepenanabont7qa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477873/normal_5fd146f58d446.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CB 5012 bytes
SHA-256: dedf95d5dc8d969f97ea9dee2bd1cf62067956b4f0d861b188d7c84a18820bfa
font_01_sfnt_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 10316 bytes
SHA-256: 6090ac6567389e8a7d328cf3d0d8b35fba3076989ca2fae2a88136f6fc63201f

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