Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e05ad950468140b…

MALICIOUS

PDF

78.5 KB Created: 2021-03-23 14:45:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ae5a1c2c8b130dc7a1afdc9077c98fe6 SHA-1: 988b9a857dae83ab5253e0a2f9cc9beb763f49d3 SHA-256: 1e05ad950468140bcae46944a9f1d4a42ee46373324e582617d681f2f92bf803
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=articad+pro+v14.+0 PDF link annotation
    • http://lenugaguv.medianewsonline.com/4943778149.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/gjh1PIZ/27920618007.pdfIn PDF document text
    • https://zunexoxefa.weebly.com/uploads/1/3/5/3/135340588/5b5fdaa4c.pdfIn PDF document text
    • https://jifafaxima.weebly.com/uploads/1/3/1/8/131871415/gefewudasupurex-sisaxekifu-pujalajiwin.pdfIn PDF document text
    • https://fapusazi.weebly.com/uploads/1/3/4/8/134849501/e1cc5aef.pdfIn PDF document text
    • https://panebafizi.weebly.com/uploads/1/3/4/3/134365464/7058486.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/J9wUMgj/wallpaper_black_shark_hd_android.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/wovedukevikov/16568519834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e0ce79-1edd-4278-bfcc-741dd6ed5d71/odd_thomas_books_in_order_of_release.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76782e07-6aac-4949-b4b9-5cc4f77cc311/vegosipebaxujinafis.pdfIn PDF document text
    • http://pemukusa.epizy.com/zupedogafajulikexupojewi.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/how_much_does_a_pmp_increase_salary.pdfIn PDF document text
    • http://dakunexafabeve.epizy.com/pejevutomuxukosakufapi.pdfIn PDF document text
    • http://lulevewutowa.epizy.com/career_portfolio_table_of_contents_template.pdfIn PDF document text
    • http://nabunuwo.epizy.com/chosen_song_status_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb800cd1-5a6e-407a-aa7b-e2e7316681f8/56837438760.pdfIn PDF document text
    • http://kepawomokatuke.myartsonline.com/best_medical_school_personal_statement_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e14c1278-dbf4-4cc2-8280-80b6ceb52246/bewiruginadolisevavudu.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_off0000eec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC4 5220 bytes
SHA-256: e45c8632d5eeb45b3220b66face7e4b6293cbb1f03653d6dd7332bde54914297
font_01_sfnt_off000100a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A9 13800 bytes
SHA-256: 190f6a9b14d47baeac3306989ed06478af898295e4024c82c32df7970f8f07a9

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