Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebf121fde5e016b…

MALICIOUS

PDF

78.5 KB Created: 2021-02-26 18:33:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 682f2419e23e3b4af4b4492aca7f77c3 SHA-1: b1e822cc67481fc073e21e8141123bac14433144 SHA-256: eebf121fde5e016b3e23d7a922fc54ebec2bd9ea43cfd4c876d492c0c9ac49b4
214 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate a phishing or malware distribution attempt. The presence of numerous external links also suggests a link farm for SEO manipulation or to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://yafferge.ru/wix?keyword=2020+daily+devotional+books In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_602be92c9111a.pdfIn PDF document text
    • https://cdn.sqhk.co/nedovipirumu/ggi5uif/90381667622.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/ibIhiif/zeganu.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/bHififk/wikab.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/hiCVxNJ/words_crush_hidden_themes_battler.pdfIn PDF document text
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/7798918.pdfIn PDF document text
    • https://cdn.sqhk.co/tajalawad/giZPsgi/dibartolo_bakery_owner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_6031e036697b6.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/imJiib8/i_wish_you_love_original.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/hjdg42e/kagogevewo.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/buponuwebi/psychiatric_evaluation_sample_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/livapebugukubodugipogigi.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/use_android_barcode_scanner_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/tetikanutuwus.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_off0000f7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A9 5268 bytes
SHA-256: 4ceaddc8ac77571d4264e9ee9ddf10d69c30eb8ce9d75106a975d2aaec053050
font_01_sfnt_off000109ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AD 10508 bytes
SHA-256: fa438f01f4e7fcfc68ab829b8f420dd90287cbf4cfe28e62cc57ba357497f1f2

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