Malicious PDF — malware analysis report

Static analysis result for SHA-256 94bc3faecd4438ee…

MALICIOUS

PDF

76.7 KB Created: 2021-05-20 01:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d1e657a67cf4ae41ea78d03d80781a30 SHA-1: 1c9920068f6a2406c86dab6abc2212b650aa0ba6 SHA-256: 94bc3faecd4438ee6d483c888a33844ad4ce16def290b519cbbc48849a7d8543
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 0.9997

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
  • 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://midufefew.ru/strik?utm_term=el+heroe+discreto+vargas+llosa+pdf PDF link annotation
    • https://lunafegosewexik.weebly.com/uploads/1/3/5/3/135351611/lopawa.pdfIn PDF document text
    • https://kozewililusu.weebly.com/uploads/1/3/4/0/134013002/buvotatebevos.pdfIn PDF document text
    • https://fixivure.weebly.com/uploads/1/3/4/8/134888316/9197754.pdfIn PDF document text
    • https://nojovuwu.weebly.com/uploads/1/3/4/6/134614298/4457a0.pdfIn PDF document text
    • https://legovizadedugid.weebly.com/uploads/1/3/1/8/131856283/7080488.pdfIn PDF document text
    • https://gudesikoz.weebly.com/uploads/1/3/4/3/134374550/5815784.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/fowikorejodi/wakiwepefojoripipefelom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/691df2a0-81af-443a-848c-fb1b6ce6b6ff/bolens_h16_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/xifazabusanufageluxadili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb14fde8-d1a8-44bb-8669-f53ecd76ee9d/how_many_cubic_feet_is_a_kenmore_coldspot_model_106.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/graffiti_reading_answers_ielts_practice_test_6.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/34829831640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff813831-5d1c-425c-bc5d-e44c372d7be2/soxenobalavufifidipezopiz.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/liziwuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f340afdc-ae1c-4292-b12b-3eabe8cea242/samsung_nx300_review_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/audit_report_under_section_10_23c_iiiad.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/zaxodaguvo.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/95286601821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b402bd-20fa-4487-af4b-5addbab1132f/what_is_the_difference_between_a_polaris_280_and_380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e96f29-56b0-4769-86c8-92e68b2aa2e2/mobile_auto_body_mechanic_near_me.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_off0000e960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE960 5432 bytes
SHA-256: b6f1b76180d75572de4f2810e4cdfca4627da40c135b449b55e84bca81c6776d
font_01_sfnt_off0000fbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE6 12316 bytes
SHA-256: d39881d3cbd0e34add796f2da065f456502bd1ae9e8c8cbdf238e925055cf9ba

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