Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7eb34b6061ec532…

MALICIOUS

PDF

74.2 KB Created: 2021-02-11 14:30:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e3e663238b73a9399213aa6d0d0abf53 SHA-1: 4098af32d5f81e21e685c99b2efcbed6cc73f96c SHA-256: e7eb34b6061ec5323da5f84709fabec4db90ed6a6170de17db0af95a3d12634b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/wix?keyword=fuji+xf1+manual PDF link annotation
    • http://xuwamamesatopa.22web.org/chopin_mysterious_forest_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_602084bb6f711.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413368/normal_5fca46d95a275.pdfIn PDF document text
    • https://tudogevu.weebly.com/uploads/1/3/2/7/132741144/1635ed8ee.pdfIn PDF document text
    • http://jebumivusesujan.iblogger.org/detanizefakibapakowuve.pdfIn PDF document text
    • http://axecheat5.xyz/remofupimuweratizukat7x26h.pdfIn PDF document text
    • https://woteginawewe.weebly.com/uploads/1/3/1/3/131379999/9136477.pdfIn PDF document text
    • https://binewetakug.weebly.com/uploads/1/3/5/3/135326509/5a316ab00772.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/wejuvono/aol_desktop_app.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/indian_saree_dress_up_games.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/computer_course_certificate_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/xalapikapuwepebetomo.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/23812264884.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/fepirakizajenoroxoli.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/python_print_format_array.pdfIn PDF document text
    • http://vezoxonu.epizy.com/nobreak_apc_back-_ups_pro_1000_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/ayyappa_songs_free.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_off0000eaa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA0 4788 bytes
SHA-256: dade27481b5081356205f550d2c0c927d2aad1a31d1f22f77d750fec195cdccd
font_01_sfnt_off0000fae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE7 9772 bytes
SHA-256: b2b5b81ddf848008380dea83893dabbd0e2248e596d428e0fb9b5dbcf4784887

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