Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4ba8cce1151455…

MALICIOUS

PDF

74.0 KB Created: 2021-03-12 13:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fb74d419994c64b79229d4ef631a92cd SHA-1: bc38f8e178ebb4b21432d4cbccaf0ec3e4edab89 SHA-256: dd4ba8cce1151455294ec3ea67795ecc4349a4211cea3df376671edcaf3ed8a0
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one at 'https://maypoin.ru/123?utm_term=tinkerbell+pumpkin+templates' being particularly suspicious due to its UTM parameters and disposable hosting. The PDF also exhibits characteristics of a link farm, suggesting it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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 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://maypoin.ru/123?utm_term=tinkerbell+pumpkin+templates PDF link annotation
    • https://xupulepil.weebly.com/uploads/1/3/4/3/134322414/4759577.pdfIn PDF document text
    • https://cdn.sqhk.co/xutujipux/chzsKzW/firelisalikizoxufixugu.pdfIn PDF document text
    • http://wonder-ita.fun/best_smart_bathroom_scales_uk017gl.pdfIn PDF document text
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/6894935.pdfIn PDF document text
    • http://4338bacchus.com/beginning_with_code_aster2z4ub.pdfIn PDF document text
    • https://cdn.sqhk.co/rodesedaded/ehb3Rjf/glzbc_sunday_school_lessons_2020.pdfIn PDF document text
    • https://kelebewo.weebly.com/uploads/1/3/4/3/134359650/sapajozet-gatopifu-besesovofupedun.pdfIn PDF document text
    • http://fringigejy.site/714527783741z7cw.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/RgcTSha/american_football_manager_2020.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/wivunonovef/solomon_asch_conformity_experiment_1956.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/19899426161.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/very_sad_status_punjabi_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab75d9d6-2fbc-4013-8928-2c42da774c9d/21965465373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6663d570-c03d-4062-9cd6-cbb4956c59b7/zogumoximof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69295fe5-dcfc-4eb0-aaa7-df4603437607/28998160310.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/49122457864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/600ce21d-1c3b-4de6-a0e1-2ad3f2ca804d/zugawitaforene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde31124-16ab-411a-a86c-b7038b5b6f8f/92321554193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3713562-8f7e-406d-be60-09288776590f/why_is_my_garmin_watch_not_charging.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_off0000e5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E4 5120 bytes
SHA-256: 576a552ea49c3ee6f8464960b9b68cbd21711834baca6dead1b0756683c74022
font_01_sfnt_off0000f72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72E 10556 bytes
SHA-256: 2353021c52dc8d42bbf41a2ff1084392b612651b4c84c4ce56ac8e2092d65074

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