Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb8c5f0fad8ca45…

MALICIOUS

PDF

104.5 KB Created: 2021-03-23 17:25:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0df29032ff17dd39a6a6151f3c3f4e83 SHA-1: 59bd051f3d3a7dfab4a7f1607679fa863de031e1 SHA-256: ffb8c5f0fad8ca45c5f1e4eb8c46a73b2003ba53bfab90fc00090c17644e64c6
156 Risk Score

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 0.9971

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://resalured.ru/wix?keyword=bdo+witch+skill+addon+guide PDF link annotation
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/e4f1bfb883e44.pdfIn PDF document text
    • https://wujojebexubab.weebly.com/uploads/1/3/1/3/131380870/a0ae428.pdfIn PDF document text
    • http://shishkin-seed.xyz/supply_chain_management_software_gartnerzomgv.pdfIn PDF document text
    • https://mibinataxufix.weebly.com/uploads/1/3/1/4/131438539/e4ac4b0.pdfIn PDF document text
    • http://reduslim-siteofficial.site/whirlpool_quiet_partner_ii_dimensionszojb1.pdfIn PDF document text
    • https://cdn.sqhk.co/badiboxa/8ggid3v/legoreborepekifij.pdfIn PDF document text
    • http://piredvizhnik.com/35322771923mgp6e.pdfIn PDF document text
    • https://cdn.sqhk.co/bajafigotuvi/aYwjjhg/harry_potter_hogwarts_mystery_quidditch_event.pdfIn PDF document text
    • https://cdn.sqhk.co/nusuguponu/hggjjgd/oztent_foxwing_eco_2._1_awning.pdfIn PDF document text
    • http://mybatut.store/xetekajodalukipuhwsco.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/povulipasukop5wrzy.pdfIn PDF document text
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/verawipofakep.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://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_0878cf78fd3f4da5a69730940076ec4c.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_d27b5450d2cc41c59bc4756ed5ae9155.pdf?index=trueIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_ac90d040a1004a22be90ba184755d924.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/numero_de_paginas_del_libro_un_monstruo_viene_a_verme.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/how_to_turn_on_heating_worcester_boiler.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/31080589515.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/aplikasi_bri_mobile_apkpure.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_697df2964a674f8882cb97b9648ec947.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/pipuwomamelute.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/pinal_county_clerk_of_superior_court_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/jewufowan.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/windows_defender_8._1.pdfIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_25daba2cf6a04c23aa4ca05600f23189.pdf?index=trueIn 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_off00014f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F5C 5192 bytes
SHA-256: b25d2715614aad9fd875439fcd987ce022de2a6d258e451d8585848092fb97f3
font_01_sfnt_off00016111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16111 10708 bytes
SHA-256: c062d7a22d259c2b02f6e70ba75a4cdad4ea64c6e5091eadf9ff22929f4e5dc1
font_02_sfnt_off00018567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18567 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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