Malicious PDF — malware analysis report

Static analysis result for SHA-256 7162a47e24e5dede…

MALICIOUS

PDF

81.6 KB Created: 2021-03-27 19:38:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5510a273c056de5f7f78a99b8b045b45 SHA-1: 538679bd03da2ea0a0d7bda52ca6b53478ec0920 SHA-256: 7162a47e24e5dedece017bdeda6bfd2f3f2d52fc0d4cc03c716f507b0c1cc58f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by multiple heuristics, including ML classification and ClamAV, specifically flagging it as a phishing and trojan PDF. The presence of external URIs and a brand impersonation credential phishing lure strongly suggests a phishing attack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://rabusefikitane.weebly.com/uploads/1/3/5/3/135314736/f7fecff84a6233.pdf.
  • 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=sentence+fluency+worksheets PDF link annotation
    • http://max-lifting.store/fizojapunonunlqjfw.pdfIn PDF document text
    • http://blankid.ru/yes_please_amy_poehler_espaoltzsli.pdfIn PDF document text
    • https://rabusefikitane.weebly.com/uploads/1/3/5/3/135314736/f7fecff84a6233.pdfIn PDF document text
    • http://winoorama.space/ivso_bluetooth_keyboard_ipad_pro_12.9g0jxw.pdfIn PDF document text
    • http://suwedujak.22web.org/neural_network_and_convolutional_neural_network_difference.pdfIn PDF document text
    • http://insuranceautousa.com/bird_song_notification_soundcbwxs.pdfIn PDF document text
    • http://luwepetewegumot.iblogger.org/77359797092.pdfIn PDF document text
    • http://instas.site/death_be_not_proud_by_john_donne_literary_analysishixqt.pdfIn PDF document text
    • http://libertinemodels.com/how_friedrich_nietzsche_died3092e.pdfIn PDF document text
    • https://tovimovu.weebly.com/uploads/1/3/0/9/130969206/gowirojumime-dapofa-tezowelul-sejubujazefek.pdfIn PDF document text
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/7363517.pdfIn PDF document text
    • http://bitagaratela.22web.org/pet_vaccination_card_template.pdfIn PDF document text
    • http://yourdesk.website/adobe_illustrator_and_photoshop5ssse.pdfIn PDF document text
    • http://namibav.iblogger.org/86243338322.pdfIn PDF document text
    • https://kibutudevitage.weebly.com/uploads/1/3/4/4/134499349/tuwetotivapar_xofik_xonowawu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://torexogisodejez.epizy.com/meteo_casinalbo_di_formigine.pdfIn PDF document text
    • http://jepisaf.epizy.com/sustainability_victoria_waste_guidelines.pdfIn PDF document text
    • http://pikusotanuw.rf.gd/18641789951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/387a66ab-cecd-4f41-96df-62c10ef04b89/shadows_of_selfhood_summary.pdfIn PDF document text
    • http://lipewolitaden.epizy.com/afmech_law_of_2013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4190185b-ae95-4e00-bb79-13413ae878d7/gantz_g_manga_download.pdfIn PDF document text
    • http://wobagelamabix.rf.gd/mobile_phone_spying_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e808b6a5-2328-4df7-b246-0d7a03f0de63/xuzakadufataneminura.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_off0000ff1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1F 5120 bytes
SHA-256: 4e93a5cf14d87123d761596fffbe17d1c49595e308e06b96afb244f797b61b4f
font_01_sfnt_off000110a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A7 11976 bytes
SHA-256: eb8859fc3e0cc99a7eea3a9938f752aacebd7b0d2ae13d0e7dfbda60b745926a

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