Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebc764a70588a41…

MALICIOUS

PDF

70.2 KB Created: 2021-05-15 19:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c6ba4a6f67017b185a8ce4c18181e8dd SHA-1: 5154bd3f82c2e0feeb3dc8adcb47819be7f4a3ea SHA-256: 7ebc764a70588a414f8e27d07c8207ed10e12ecc504fa9006075bfb00467a4c1
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://nipisod.ru/strik?utm_term=ford+ranger+pickup+bed+floor+rust+repair+panel PDF link annotation
    • http://paypallsecurity.com/vigafoviwa3iizp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443803/normal_5fe083dca4ac2.pdfIn PDF document text
    • http://leqqurint.online/penny_stocks_to_buy_in_april_2020dgknu.pdfIn PDF document text
    • http://reduslim-ordina.site/desivepzydou.pdfIn PDF document text
    • http://magic-world.site/ice_hockey_game_toronto_schedules57b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405660/normal_6068348036f3d.pdfIn PDF document text
    • http://floradoma.net/period_tracker_deluxe_apk_free_downloadmacxw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417325/normal_6003d230a6f87.pdfIn PDF document text
    • http://autokenn.com/codigo_procesal_civil_y_mercantil_comentado_2016uztdb.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/jepinebawo/44966148269.pdfIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_26fcbb15924f4c318790ffca2474be8f.pdf?index=trueIn PDF document text
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_e138dd0ce6194eed83e065e2a4694a38.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vosimalume/19598638708.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/sukokajita.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/14695841842.pdfIn PDF document text
    • http://xulivef.rf.gd/ndis_quarterly_report_june_2019.pdfIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_62fa8ee509544df4ac8a9188b7604f0b.pdf?index=trueIn PDF document text
    • http://puzexexaniledow.epizy.com/83732246380.pdfIn PDF document text
    • http://fipabadidori.epizy.com/vomeruwosufujel.pdfIn PDF document text
    • http://wuburujezajewix.epizy.com/north_america_map_with_cities.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_off0000d596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD596 5480 bytes
SHA-256: 69d87fbbcc352dd65d489db7b9ea7668b01cbe13bff76de276d2ee61647e08d9
font_01_sfnt_off0000e84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84E 10356 bytes
SHA-256: 9d695c8c82598627f7881de6298bb8849357db0d6ead8cf7dda63ceac4a72348

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