Malicious PDF — malware analysis report

Static analysis result for SHA-256 039534018a224d4e…

MALICIOUS

PDF

101.7 KB Created: 2021-03-21 00:34:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 675d26dc0b80f14877200863c2b7ec83 SHA-1: b4d7cfe86528557568c6addcd297ba67947bf55f SHA-256: 039534018a224d4ee4b2fa83d281bcf6e1a298f636b11ff8d65b592daff4d6aa
186 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 0.9993

Heuristics 6

  • 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.
  • 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://jottigo.ru/award?keyword=types+of+poultry+breeds+pdf PDF link annotation
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/riwuributajixol_musovusubivak.pdfIn PDF document text
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/fojig.pdfIn PDF document text
    • https://bekogome.weebly.com/uploads/1/3/1/4/131454098/xesopab.pdfIn PDF document text
    • https://vuxemirisem.weebly.com/uploads/1/3/1/4/131453034/8cce25559eb70c7.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/3160691.pdfIn PDF document text
    • https://fifusikusivupe.weebly.com/uploads/1/3/4/6/134638905/gilujiwibe_foganowibad_jutafuku.pdfIn PDF document text
    • https://jozonoralemepi.weebly.com/uploads/1/3/4/5/134508889/2217335.pdfIn PDF document text
    • https://paxuxitusokewu.weebly.com/uploads/1/3/1/3/131380341/gaxupejup.pdfIn PDF document text
    • https://nakidero.weebly.com/uploads/1/3/4/5/134524904/nazubazefuge-wezidos-bipumewatozi.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/fibrosis_cystic.pdfIn PDF document text
    • https://tobejisexin.weebly.com/uploads/1/3/1/4/131454505/roruwumoxomuvamupa.pdfIn PDF document text
    • http://zitirisiz.mywebcommunity.org/87423719573.pdfIn PDF document text
    • https://lalevajapogos.weebly.com/uploads/1/3/0/8/130874146/e1ade217f2.pdfIn PDF document text
    • https://dotowukigirer.weebly.com/uploads/1/3/1/1/131163902/5768322.pdfIn PDF document text
    • https://nibasekugi.weebly.com/uploads/1/3/1/0/131070633/3136921.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/cf0847ec-62ed-4671-9b6c-8d3fc3786041/duxagejiwatiko.pdfIn PDF document text
    • http://powagamojij.onlinewebshop.net/69891313011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec5a9c01-a80b-4ced-a1fa-7a499c441bd2/susulajotan.pdfIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_102fcbb470d34c7ca9924400bed027d4.pdf?index=trueIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_2f4e64567ad24fcdaa0b64ec7cca2772.pdf?index=trueIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_24dadfa1180f4587985bb101d91b8be8.pdf?index=trueIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/evenflo_symphony_sport_all-in-one_car_seat_installation.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_off00013ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDD 4744 bytes
SHA-256: d64fbe6ce7246ead31c51f36766dba86a11e0152f629d0b91cb59d708c38f9fb
font_01_sfnt_off00014e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E1A 15856 bytes
SHA-256: dd7b46c10c36377bcbc7301e0f2d386336629c91a4a081eb32a407224d003ba7
font_02_sfnt_off00017adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17ADF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361