Malicious PDF — malware analysis report

Static analysis result for SHA-256 b248cf32dcba5c20…

MALICIOUS

PDF

101.8 KB Created: 2021-02-24 10:20:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d6b7106bd0c7b946b2be4e33f14a67c1 SHA-1: 85067f93ae5581706674fbd464fd97fbc2e6bb02 SHA-256: b248cf32dcba5c20c0bac6ae3199e9f20e17e7ab1a25a005fad3af827a7fe55d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were extracted, the embedded URL is the primary attack vector, likely leading to a phishing page or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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=an+inconvenient+sequel+truth+to+power+worksheet+part+2+answers In PDF document text
    • https://static.s123-cdn-static.com/uploads/4390680/normal_5ffa1dc1e95e5.pdfIn PDF document text
    • https://cdn.sqhk.co/fezivabuja/gwijV0H/dorobixidewizar.pdfIn PDF document text
    • http://sipebep.22web.org/indigenous_employment_policy_template.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/4KFdji9/82215462796.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/epaheLy/90709813595.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/ggPHUid/labezufererikapavededun.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/fewifuwu/archero_mod_gold_apk.pdfIn PDF document text
    • http://tewilojejesuj.epizy.com/34478410448.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/free_templates_adobe_premiere_pro_cc.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/kuwajemomene.pdfIn PDF document text
    • http://xubixetumed.rf.gd/60060872417.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/ewing_nj_weather_report.pdfIn PDF document text
    • http://tizelimanux.rf.gd/renovexuwisiluwuxuxuzonit.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/15994562412.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_off000152ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152EC 5484 bytes
SHA-256: 847259da84fbb57576e75d9bd8a3a777f6aa2a2d1508b0fa8514e2051e5bca87
font_01_sfnt_off000165ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165AB 10472 bytes
SHA-256: 0c81c4c6c0fb8e398f129f998c2848710a1c9e9f5c4c1534c1a844e93bbda833

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