Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bcac890bfb21ef…

MALICIOUS

PDF

81.8 KB Created: 2021-05-30 21:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2ba8fcebd90e5bf142fdd5c528295978 SHA-1: 556f41d2edd868642b2a267f1c5c3b4e021975b3 SHA-256: 02bcac890bfb21ef778942e2882c32eaf95145dd59ab38cb233b6cd32ef7ef34
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-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://jacksth.ru/strik?utm_term=carta+de+los+reyes+magos+para+los+ni%25C3%25B1os+pdf PDF link annotation
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/jaweral_fuzomejadimeki_zokukuwod_lavelumuzeg.pdfIn PDF document text
    • https://zixotojene.weebly.com/uploads/1/3/4/3/134315054/muxezaxajufene.pdfIn PDF document text
    • https://lozexisivebuzon.weebly.com/uploads/1/3/4/7/134702594/sisiwusaku_sobivudol_gejavab_kosovurimimap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2c3b9f-8c46-4e1b-9b8d-8ba22d6df580/dentek_comfort_fit_dental_guard_kit_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c4fc5de-cf44-4d35-8bb0-5d3ac59b0840/how_to_calculate_nett_salary_from_gross.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d5df3b8-7293-46a1-8959-f1bb3fbf2860/70315076122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/828175fd-fcc3-42a4-9f11-f0f901f00855/93956266999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5382725-2b3e-4d6a-9cd0-dfd657bfd1ab/can_you_add_a_canopy_to_a_radio_flyer_wagon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4db7de3e-b7c1-402e-b93d-2baea3b901c3/luvovigezeromorogamifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc075b8-60ad-4016-b728-f2e63a45081a/mupokixawuluman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bccc088-100d-4839-80a6-a7ed7a3e3792/81552385275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/146002cc-28f2-421c-a2a5-9a5e96e773f8/vaxijenubisan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3277640c-aebb-4efe-8870-874a11a6e2ed/88236675557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/251d5ce3-75c1-48df-a932-1ad8564904a0/how_to_reset_lg_portable_air_conditioner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb505b8f-049d-43b8-b521-bb2d8ab90b3d/81052330771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c83cbb0-5286-41d1-9021-d4874c9408b7/effective_communication_skills_in_healthcare.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_off0000fecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECC 5580 bytes
SHA-256: fbcc56b55fd85c04c20c74dcbb284e9659c2f74b3a151f69243286dcf434b2a1
font_01_sfnt_off00011176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11176 11768 bytes
SHA-256: 3ed4417fb20afb9b15205ff323e376e7a6b0073c71b4d8da40f25a4777f6ba9d

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