Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b9265f7098448e…

MALICIOUS

PDF

71.5 KB Created: 2021-03-14 16:53:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9b9ed2fb70d2c900215ffe9fd366371b SHA-1: 53a8f164b668b3cefca78ac72d8bc7c4f169e2f0 SHA-256: d9b9265f7098448ec499afefc8b69eeff89b0894b24990275d3434eff81c529a
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 0.9996

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 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/wix?keyword=chemfiesta+dilutions+worksheet+answers PDF link annotation
    • http://pestore.pro/27009901171zy72a.pdfIn PDF document text
    • http://teenagetutor.net/painting_ideas_easy_for_beginnersuosxm.pdfIn PDF document text
    • http://kasiwewevono.iblogger.org/wall_street_journal_missed_paper_delivery.pdfIn PDF document text
    • http://merogerofame.66ghz.com/4062172523.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/gijbqhf/bewufedenatidezev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446260/normal_600a9d58c9f08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418963/normal_5ff8160343c22.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/cWjaYZI/othello_game_online_multiplayer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462341/normal_5fcaeb6e7ba04.pdfIn PDF document text
    • http://fuwefepor.iblogger.org/age_of_reform_us_history.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373527/normal_5fdd7c606d0b1.pdfIn PDF document text
    • http://inostrana.com/gunilumoxigowr54l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rirokisigutu.rf.gd/what_is_heightened_sense_of_touch.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/rukorolelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c36b54-26d8-45cf-9722-4dd9649770cc/what_is_the_relationship_between_gis_and_geography.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/certificate_of_excellence_template_google_docs.pdfIn PDF document text
    • http://sewuxikamumo.rf.gd/how_to_tell_if_someone_is_pansexual.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/sofinidunofugepivoneb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e36e2e-ad61-401d-8624-073ed539ecfa/fishman_loudbox_artist_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce0cfcf-a7e1-499c-a791-4628d8ace242/dalitokaro.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/rebate_form_for_alcon_contact_lenses.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AE 5208 bytes
SHA-256: d55ccc7e27b64ddc970f7c4da91ced83df70ad83ceba6b4ffa9205c713d13cff
font_01_sfnt_off0000e941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE941 11028 bytes
SHA-256: d9ac88ead6c0edf4d7abd4fcff3080cbd9f2dc4dfe70faa0740c1a469b5f04af

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