Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb3d1eaf3846322…

MALICIOUS

PDF

84.6 KB Created: 2021-03-29 04:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1a2a267c3d3ed62e14d70a8e1b3c5f58 SHA-1: 580c77779aaff451a6d4fe20264f393cccfca126 SHA-256: fcb3d1eaf384632288fda788a01e8615d526cefeb7def8260a272ceeb0a22b78
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://gimoguvi.ru/strik?utm_term=how+to+use+a+wood+lathe+video PDF link annotation
    • https://pagafamowadaf.weebly.com/uploads/1/3/4/8/134878907/4435422.pdfIn PDF document text
    • http://nipojugotav.iblogger.org/92268907744.pdfIn PDF document text
    • https://zutovabofilosu.weebly.com/uploads/1/3/4/3/134333865/b8a9e052.pdfIn PDF document text
    • http://kilobowomix.22web.org/pantheon_guide_cookie_clicker.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c2550db7-c8a2-480e-a99e-d2edc0caaf51/8839215557.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/how_do_i_open_my_sentry_safe_when_the_battery_is_dead.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/17984761812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2371963-5752-443f-9fcf-a77f3a2a376e/dodabini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7df4d09d-6cf5-49c4-adcc-d199222bf2f6/wiwojebifufume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e25758-ba30-422f-988b-0d43e871b8a1/81564477622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7170eb75-fea5-4c2b-a9a4-f2fc7968adee/how_to_factory_reset_an_ellipsis_tablet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa7bebdc-dac4-451d-9454-1a0905bbce72/wivixikalubab.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/lobapawumujosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42c07d21-d96a-4b07-befc-b1f16dca0c70/software_development_cycle_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c8f75e-0c41-4005-bfba-d8b0744077a2/forumolujapofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1be93e0-d8b9-4953-9433-1dec0d86044c/what_does_this_emoji_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ff44892-7b20-46bb-ae52-5197c1463842/how_to_use_apple_music_on_imovie_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a5cbf7d-e904-4d2e-8620-f64cb7a395b6/65328952746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e928f4de-f3c8-4502-9b10-2109d0f6f674/48061598401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68f761e7-1099-4b4a-87d8-ed6ba3a58a74/rawosagogoz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10101 4704 bytes
SHA-256: d8563606b0dd34a7085cc056b93b228357bb237a864ae0ee09c8657052834e09
font_01_sfnt_off00011119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11119 11360 bytes
SHA-256: 79de1bc01257e4a0897e62ec3fe0285fdb8e7fb3f825521de286ec33f75192eb
font_02_sfnt_off000136dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136DC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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