Malicious PDF — malware analysis report

Static analysis result for SHA-256 1704598dd004aacc…

MALICIOUS

PDF

77.6 KB Created: 2021-03-09 22:02:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4e6afc970d8f00305c137e8fcae53dce SHA-1: 5c0334f732ef90c16608484ad8c4fd3cbc38d3ce SHA-256: 1704598dd004aaccf78eb883616c2af9bcbcc54cc3e9e1200ea3639409808bea
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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 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://gimoguvi.ru/wix?keyword=ap+lit+practice+multiple+choice+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476580/normal_5ffecec408c1a.pdfIn PDF document text
    • http://zinuvudoliku.iblogger.org/law_office_manual_sample.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487424/normal_5ff541387b385.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407303/normal_5fc8e355cb6d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369185/normal_5fdce1ad2fe20.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/49852d11-5e16-4b54-ba69-fa8ed3330727/how_to_start_jenn_air_self_cleaning_oven.pdfIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_acc32d0e29354f8f97e0d19713ae7d37.pdf?index=trueIn PDF document text
    • http://tufosugobevoni.rf.gd/fundamentals_of_arm_wrestling_with_my_father.pdfIn PDF document text
    • http://tuguxukoz.epizy.com/wenojudawevogaf.pdfIn PDF document text
    • http://lorazak.epizy.com/birdbrain_robot_server_mac.pdfIn PDF document text
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_cda7970a562b4b4da483101762c69fe7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6198209e-bbd1-4016-b3f9-03737a5f3961/does_bodyweight_training_burn_fat.pdfIn PDF document text
    • http://jabekafu.epizy.com/rasijezipaxagibaxu.pdfIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_d5323cd5bbaf4a1f8f45ac576c6997c5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e192b24-330d-4914-9812-484edbe0f3c1/kiwuxixalizakulopirup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea22d1d1-d5b2-49c0-9add-b01408de3542/raxuzo.pdfIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_510d629cc3df479c880d5e92285e16ee.pdf?index=trueIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_7f2e2fc56f8b4e208df4ee2edd8b672c.pdf?index=trueIn PDF document text
    • http://vebavibokifoko.epizy.com/google_drive_backup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b6dc1a-1f63-41be-b3d0-5382d8f4cc66/nidiselefewapetegowejomo.pdfIn PDF document text
    • http://dinixebun.epizy.com/pusomizilefezano.pdfIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_ffc25274f80b4feca946f5f3aa7feef5.pdf?index=trueIn PDF document text
    • http://mafilijesov.epizy.com/the_7_sorrows_of_mary_rosary.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_off0000f32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32D 5204 bytes
SHA-256: f003ba9105c77a67becf6e3475865ec324be7a12f76f23703091269c1fe92068
font_01_sfnt_off000104b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B6 10624 bytes
SHA-256: 2f2ccb3269f01e94da63b1e17c2235b59aa1a88505d0695dfba1fbd78a2b8d8e

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